Research and analysis
D6ai: Relative abundance of priority species in England, 1970 to 2024
Updated 13 May 2026
| year | trendline | value |
|---|---|---|
| 1970 | Smoothed index (option 1) | 100.0 |
| 1971 | Smoothed index (option 1) | 92.17147693 |
| 1972 | Smoothed index (option 1) | 85.98078257 |
| 1973 | Smoothed index (option 1) | 81.05153601 |
| 1974 | Smoothed index (option 1) | 77.09954138 |
| 1975 | Smoothed index (option 1) | 73.90565674 |
| 1976 | Smoothed index (option 1) | 71.29720918 |
| 1977 | Smoothed index (option 1) | 69.13515469 |
| 1978 | Smoothed index (option 1) | 67.3051773 |
| 1979 | Smoothed index (option 1) | 65.71153141 |
| 1980 | Smoothed index (option 1) | 64.27181958 |
| 1981 | Smoothed index (option 1) | 62.91254453 |
| 1982 | Smoothed index (option 1) | 61.5674973 |
| 1983 | Smoothed index (option 1) | 60.17713049 |
| 1984 | Smoothed index (option 1) | 58.68856546 |
| 1985 | Smoothed index (option 1) | 57.05609748 |
| 1986 | Smoothed index (option 1) | 55.24206136 |
| 1987 | Smoothed index (option 1) | 53.2186376 |
| 1988 | Smoothed index (option 1) | 50.98054102 |
| 1989 | Smoothed index (option 1) | 48.5522567 |
| 1990 | Smoothed index (option 1) | 45.98280047 |
| 1991 | Smoothed index (option 1) | 43.33895093 |
| 1992 | Smoothed index (option 1) | 40.69804594 |
| 1993 | Smoothed index (option 1) | 38.14128793 |
| 1994 | Smoothed index (option 1) | 35.748471 |
| 1995 | Smoothed index (option 1) | 33.59126527 |
| 1996 | Smoothed index (option 1) | 31.71278798 |
| 1997 | Smoothed index (option 1) | 30.12802678 |
| 1998 | Smoothed index (option 1) | 28.83238788 |
| 1999 | Smoothed index (option 1) | 27.8077641 |
| 2000 | Smoothed index (option 1) | 27.0262235 |
| 2001 | Smoothed index (option 1) | 26.45167713 |
| 2002 | Smoothed index (option 1) | 26.03999759 |
| 2003 | Smoothed index (option 1) | 25.74348797 |
| 2004 | Smoothed index (option 1) | 25.52334023 |
| 2005 | Smoothed index (option 1) | 25.35017812 |
| 2006 | Smoothed index (option 1) | 25.2030083 |
| 2007 | Smoothed index (option 1) | 25.06864455 |
| 2008 | Smoothed index (option 1) | 24.94137718 |
| 2009 | Smoothed index (option 1) | 24.82274949 |
| 2010 | Smoothed index (option 1) | 24.72120344 |
| 2011 | Smoothed index (option 1) | 24.64608276 |
| 2012 | Smoothed index (option 1) | 24.60061563 |
| 2013 | Smoothed index (option 1) | 24.58162022 |
| 2014 | Smoothed index (option 1) | 24.57953346 |
| 2015 | Smoothed index (option 1) | 24.57836451 |
| 2016 | Smoothed index (option 1) | 24.55566059 |
| 2017 | Smoothed index (option 1) | 24.48263218 |
| 2018 | Smoothed index (option 1) | 24.324933 |
| 2019 | Smoothed index (option 1) | 24.04657282 |
| 2020 | Smoothed index (option 1) | 23.61317267 |
| 2021 | Smoothed index (option 1) | 22.99417186 |
| 2022 | Smoothed index (option 1) | 22.16548116 |
| 2023 | Smoothed index (option 1) | 21.1123816 |
| 2024 | Smoothed index (option 1) | 19.83232846 |
| 1970 | 95% credible interval lower bound (option 1) | 100.0 |
| 1971 | 95% credible interval lower bound (option 1) | 90.28930573 |
| 1972 | 95% credible interval lower bound (option 1) | 82.9209417 |
| 1973 | 95% credible interval lower bound (option 1) | 77.23468907 |
| 1974 | 95% credible interval lower bound (option 1) | 72.82137495 |
| 1975 | 95% credible interval lower bound (option 1) | 69.24110787 |
| 1976 | 95% credible interval lower bound (option 1) | 66.37834026 |
| 1977 | 95% credible interval lower bound (option 1) | 63.99367694 |
| 1978 | 95% credible interval lower bound (option 1) | 61.98790077 |
| 1979 | 95% credible interval lower bound (option 1) | 60.2575533 |
| 1980 | 95% credible interval lower bound (option 1) | 58.62550449 |
| 1981 | 95% credible interval lower bound (option 1) | 57.16902839 |
| 1982 | 95% credible interval lower bound (option 1) | 55.6960947 |
| 1983 | 95% credible interval lower bound (option 1) | 54.12783802 |
| 1984 | 95% credible interval lower bound (option 1) | 52.56974545 |
| 1985 | 95% credible interval lower bound (option 1) | 50.8664081 |
| 1986 | 95% credible interval lower bound (option 1) | 49.09032316 |
| 1987 | 95% credible interval lower bound (option 1) | 47.09334425 |
| 1988 | 95% credible interval lower bound (option 1) | 44.93790193 |
| 1989 | 95% credible interval lower bound (option 1) | 42.64908756 |
| 1990 | 95% credible interval lower bound (option 1) | 40.30258215 |
| 1991 | 95% credible interval lower bound (option 1) | 37.98077823 |
| 1992 | 95% credible interval lower bound (option 1) | 35.54300078 |
| 1993 | 95% credible interval lower bound (option 1) | 33.29056865 |
| 1994 | 95% credible interval lower bound (option 1) | 31.16263783 |
| 1995 | 95% credible interval lower bound (option 1) | 29.21378652 |
| 1996 | 95% credible interval lower bound (option 1) | 27.4759202 |
| 1997 | 95% credible interval lower bound (option 1) | 26.00293731 |
| 1998 | 95% credible interval lower bound (option 1) | 24.79690107 |
| 1999 | 95% credible interval lower bound (option 1) | 23.89503398 |
| 2000 | 95% credible interval lower bound (option 1) | 23.13793287 |
| 2001 | 95% credible interval lower bound (option 1) | 22.62632274 |
| 2002 | 95% credible interval lower bound (option 1) | 22.19057091 |
| 2003 | 95% credible interval lower bound (option 1) | 21.87212215 |
| 2004 | 95% credible interval lower bound (option 1) | 21.68536192 |
| 2005 | 95% credible interval lower bound (option 1) | 21.48511733 |
| 2006 | 95% credible interval lower bound (option 1) | 21.31940845 |
| 2007 | 95% credible interval lower bound (option 1) | 21.19370327 |
| 2008 | 95% credible interval lower bound (option 1) | 21.06199633 |
| 2009 | 95% credible interval lower bound (option 1) | 20.92271009 |
| 2010 | 95% credible interval lower bound (option 1) | 20.78585692 |
| 2011 | 95% credible interval lower bound (option 1) | 20.65144763 |
| 2012 | 95% credible interval lower bound (option 1) | 20.57014791 |
| 2013 | 95% credible interval lower bound (option 1) | 20.51072038 |
| 2014 | 95% credible interval lower bound (option 1) | 20.45860016 |
| 2015 | 95% credible interval lower bound (option 1) | 20.38536966 |
| 2016 | 95% credible interval lower bound (option 1) | 20.36041287 |
| 2017 | 95% credible interval lower bound (option 1) | 20.31008658 |
| 2018 | 95% credible interval lower bound (option 1) | 20.17855379 |
| 2019 | 95% credible interval lower bound (option 1) | 19.92926587 |
| 2020 | 95% credible interval lower bound (option 1) | 19.54390022 |
| 2021 | 95% credible interval lower bound (option 1) | 18.99811472 |
| 2022 | 95% credible interval lower bound (option 1) | 18.33954855 |
| 2023 | 95% credible interval lower bound (option 1) | 17.50417259 |
| 2024 | 95% credible interval lower bound (option 1) | 16.40139823 |
| 1970 | 95% credible interval upper bound (option 1) | 100.0 |
| 1971 | 95% credible interval upper bound (option 1) | 94.13227293 |
| 1972 | 95% credible interval upper bound (option 1) | 89.24516231 |
| 1973 | 95% credible interval upper bound (option 1) | 85.17055593 |
| 1974 | 95% credible interval upper bound (option 1) | 81.82800288 |
| 1975 | 95% credible interval upper bound (option 1) | 78.99569489 |
| 1976 | 95% credible interval upper bound (option 1) | 76.62004604 |
| 1977 | 95% credible interval upper bound (option 1) | 74.76338796 |
| 1978 | 95% credible interval upper bound (option 1) | 73.17178307 |
| 1979 | 95% credible interval upper bound (option 1) | 71.94565866 |
| 1980 | 95% credible interval upper bound (option 1) | 70.64200179 |
| 1981 | 95% credible interval upper bound (option 1) | 69.3697297 |
| 1982 | 95% credible interval upper bound (option 1) | 68.12042384 |
| 1983 | 95% credible interval upper bound (option 1) | 66.82069744 |
| 1984 | 95% credible interval upper bound (option 1) | 65.34100667 |
| 1985 | 95% credible interval upper bound (option 1) | 63.67767079 |
| 1986 | 95% credible interval upper bound (option 1) | 61.91670117 |
| 1987 | 95% credible interval upper bound (option 1) | 59.90956851 |
| 1988 | 95% credible interval upper bound (option 1) | 57.53556324 |
| 1989 | 95% credible interval upper bound (option 1) | 54.92432227 |
| 1990 | 95% credible interval upper bound (option 1) | 52.26893968 |
| 1991 | 95% credible interval upper bound (option 1) | 49.43777697 |
| 1992 | 95% credible interval upper bound (option 1) | 46.64662376 |
| 1993 | 95% credible interval upper bound (option 1) | 43.72616452 |
| 1994 | 95% credible interval upper bound (option 1) | 40.9866555 |
| 1995 | 95% credible interval upper bound (option 1) | 38.69486453 |
| 1996 | 95% credible interval upper bound (option 1) | 36.73757106 |
| 1997 | 95% credible interval upper bound (option 1) | 34.99611004 |
| 1998 | 95% credible interval upper bound (option 1) | 33.59360843 |
| 1999 | 95% credible interval upper bound (option 1) | 32.59254959 |
| 2000 | 95% credible interval upper bound (option 1) | 31.82322747 |
| 2001 | 95% credible interval upper bound (option 1) | 31.15070722 |
| 2002 | 95% credible interval upper bound (option 1) | 30.64132896 |
| 2003 | 95% credible interval upper bound (option 1) | 30.41710011 |
| 2004 | 95% credible interval upper bound (option 1) | 30.14842292 |
| 2005 | 95% credible interval upper bound (option 1) | 30.01527862 |
| 2006 | 95% credible interval upper bound (option 1) | 29.85575223 |
| 2007 | 95% credible interval upper bound (option 1) | 29.72372839 |
| 2008 | 95% credible interval upper bound (option 1) | 29.50046544 |
| 2009 | 95% credible interval upper bound (option 1) | 29.40815362 |
| 2010 | 95% credible interval upper bound (option 1) | 29.32223607 |
| 2011 | 95% credible interval upper bound (option 1) | 29.2782096 |
| 2012 | 95% credible interval upper bound (option 1) | 29.25369013 |
| 2013 | 95% credible interval upper bound (option 1) | 29.22740256 |
| 2014 | 95% credible interval upper bound (option 1) | 29.31024709 |
| 2015 | 95% credible interval upper bound (option 1) | 29.30870617 |
| 2016 | 95% credible interval upper bound (option 1) | 29.30590243 |
| 2017 | 95% credible interval upper bound (option 1) | 29.37228028 |
| 2018 | 95% credible interval upper bound (option 1) | 29.30469848 |
| 2019 | 95% credible interval upper bound (option 1) | 29.07367693 |
| 2020 | 95% credible interval upper bound (option 1) | 28.6724163 |
| 2021 | 95% credible interval upper bound (option 1) | 27.97866758 |
| 2022 | 95% credible interval upper bound (option 1) | 27.05573389 |
| 2023 | 95% credible interval upper bound (option 1) | 25.6515318 |
| 2024 | 95% credible interval upper bound (option 1) | 23.99936337 |
| 1970 | Smoothed index (option 2) | 100.0 |
| 1971 | Smoothed index (option 2) | 89.89207676 |
| 1972 | Smoothed index (option 2) | 83.2288988 |
| 1973 | Smoothed index (option 2) | 78.99479941 |
| 1974 | Smoothed index (option 2) | 76.50651105 |
| 1975 | Smoothed index (option 2) | 75.1995954 |
| 1976 | Smoothed index (option 2) | 74.36332501 |
| 1977 | Smoothed index (option 2) | 73.07639267 |
| 1978 | Smoothed index (option 2) | 70.65744762 |
| 1979 | Smoothed index (option 2) | 67.36737516 |
| 1980 | Smoothed index (option 2) | 64.27398918 |
| 1981 | Smoothed index (option 2) | 62.25545162 |
| 1982 | Smoothed index (option 2) | 61.24459904 |
| 1983 | Smoothed index (option 2) | 60.39356904 |
| 1984 | Smoothed index (option 2) | 58.93155232 |
| 1985 | Smoothed index (option 2) | 56.74479184 |
| 1986 | Smoothed index (option 2) | 54.25972866 |
| 1987 | Smoothed index (option 2) | 51.85936732 |
| 1988 | Smoothed index (option 2) | 49.66767574 |
| 1989 | Smoothed index (option 2) | 47.6281837 |
| 1990 | Smoothed index (option 2) | 45.67893049 |
| 1991 | Smoothed index (option 2) | 43.7931912 |
| 1992 | Smoothed index (option 2) | 41.94686665 |
| 1993 | Smoothed index (option 2) | 40.04492794 |
| 1994 | Smoothed index (option 2) | 37.92780166 |
| 1995 | Smoothed index (option 2) | 35.48654951 |
| 1996 | Smoothed index (option 2) | 32.81974833 |
| 1997 | Smoothed index (option 2) | 30.18421473 |
| 1998 | Smoothed index (option 2) | 27.88172876 |
| 1999 | Smoothed index (option 2) | 26.183264 |
| 2000 | Smoothed index (option 2) | 25.3386915 |
| 2001 | Smoothed index (option 2) | 25.38660601 |
| 2002 | Smoothed index (option 2) | 25.99742808 |
| 2003 | Smoothed index (option 2) | 26.46610588 |
| 2004 | Smoothed index (option 2) | 26.28712077 |
| 2005 | Smoothed index (option 2) | 25.55384108 |
| 2006 | Smoothed index (option 2) | 24.82989578 |
| 2007 | Smoothed index (option 2) | 24.51500253 |
| 2008 | Smoothed index (option 2) | 24.69456989 |
| 2009 | Smoothed index (option 2) | 25.21590541 |
| 2010 | Smoothed index (option 2) | 25.81783159 |
| 2011 | Smoothed index (option 2) | 26.13741243 |
| 2012 | Smoothed index (option 2) | 25.85089799 |
| 2013 | Smoothed index (option 2) | 24.99902243 |
| 2014 | Smoothed index (option 2) | 23.99314525 |
| 2015 | Smoothed index (option 2) | 23.28824233 |
| 2016 | Smoothed index (option 2) | 23.04987561 |
| 2017 | Smoothed index (option 2) | 23.19310344 |
| 2018 | Smoothed index (option 2) | 23.52219291 |
| 2019 | Smoothed index (option 2) | 23.83625853 |
| 2020 | Smoothed index (option 2) | 23.92935792 |
| 2021 | Smoothed index (option 2) | 23.62829202 |
| 2022 | Smoothed index (option 2) | 22.83037991 |
| 2023 | Smoothed index (option 2) | 21.51536664 |
| 2024 | Smoothed index (option 2) | 19.71957096 |
| 1970 | 95% credible interval lower bound (option 2) | 100.0 |
| 1971 | 95% credible interval lower bound (option 2) | 87.62789251 |
| 1972 | 95% credible interval lower bound (option 2) | 79.81642374 |
| 1973 | 95% credible interval lower bound (option 2) | 74.8718952 |
| 1974 | 95% credible interval lower bound (option 2) | 71.83344289 |
| 1975 | 95% credible interval lower bound (option 2) | 70.06157581 |
| 1976 | 95% credible interval lower bound (option 2) | 68.93460923 |
| 1977 | 95% credible interval lower bound (option 2) | 67.11155735 |
| 1978 | 95% credible interval lower bound (option 2) | 64.53864389 |
| 1979 | 95% credible interval lower bound (option 2) | 61.41987253 |
| 1980 | 95% credible interval lower bound (option 2) | 58.45211697 |
| 1981 | 95% credible interval lower bound (option 2) | 56.29913596 |
| 1982 | 95% credible interval lower bound (option 2) | 54.99347913 |
| 1983 | 95% credible interval lower bound (option 2) | 53.91805172 |
| 1984 | 95% credible interval lower bound (option 2) | 52.3047284 |
| 1985 | 95% credible interval lower bound (option 2) | 50.24956235 |
| 1986 | 95% credible interval lower bound (option 2) | 48.00886264 |
| 1987 | 95% credible interval lower bound (option 2) | 45.97479292 |
| 1988 | 95% credible interval lower bound (option 2) | 43.90801216 |
| 1989 | 95% credible interval lower bound (option 2) | 42.08519659 |
| 1990 | 95% credible interval lower bound (option 2) | 40.37581387 |
| 1991 | 95% credible interval lower bound (option 2) | 38.49042198 |
| 1992 | 95% credible interval lower bound (option 2) | 36.68550621 |
| 1993 | 95% credible interval lower bound (option 2) | 34.83536426 |
| 1994 | 95% credible interval lower bound (option 2) | 32.92490642 |
| 1995 | 95% credible interval lower bound (option 2) | 30.64263913 |
| 1996 | 95% credible interval lower bound (option 2) | 28.2558323 |
| 1997 | 95% credible interval lower bound (option 2) | 25.96937591 |
| 1998 | 95% credible interval lower bound (option 2) | 23.95740497 |
| 1999 | 95% credible interval lower bound (option 2) | 22.36861069 |
| 2000 | 95% credible interval lower bound (option 2) | 21.58409468 |
| 2001 | 95% credible interval lower bound (option 2) | 21.65048054 |
| 2002 | 95% credible interval lower bound (option 2) | 22.12289938 |
| 2003 | 95% credible interval lower bound (option 2) | 22.47808561 |
| 2004 | 95% credible interval lower bound (option 2) | 22.37042569 |
| 2005 | 95% credible interval lower bound (option 2) | 21.68846448 |
| 2006 | 95% credible interval lower bound (option 2) | 21.06128397 |
| 2007 | 95% credible interval lower bound (option 2) | 20.75234039 |
| 2008 | 95% credible interval lower bound (option 2) | 20.82716725 |
| 2009 | 95% credible interval lower bound (option 2) | 21.16027309 |
| 2010 | 95% credible interval lower bound (option 2) | 21.62225655 |
| 2011 | 95% credible interval lower bound (option 2) | 21.83000644 |
| 2012 | 95% credible interval lower bound (option 2) | 21.48445361 |
| 2013 | 95% credible interval lower bound (option 2) | 20.75989842 |
| 2014 | 95% credible interval lower bound (option 2) | 19.86969628 |
| 2015 | 95% credible interval lower bound (option 2) | 19.27465641 |
| 2016 | 95% credible interval lower bound (option 2) | 19.09308085 |
| 2017 | 95% credible interval lower bound (option 2) | 19.21046131 |
| 2018 | 95% credible interval lower bound (option 2) | 19.4248405 |
| 2019 | 95% credible interval lower bound (option 2) | 19.57564362 |
| 2020 | 95% credible interval lower bound (option 2) | 19.65220537 |
| 2021 | 95% credible interval lower bound (option 2) | 19.29591099 |
| 2022 | 95% credible interval lower bound (option 2) | 18.60890155 |
| 2023 | 95% credible interval lower bound (option 2) | 17.58724332 |
| 2024 | 95% credible interval lower bound (option 2) | 16.0717814 |
| 1970 | 95% credible interval upper bound (option 2) | 100.0 |
| 1971 | 95% credible interval upper bound (option 2) | 92.42127921 |
| 1972 | 95% credible interval upper bound (option 2) | 87.11149828 |
| 1973 | 95% credible interval upper bound (option 2) | 83.65955218 |
| 1974 | 95% credible interval upper bound (option 2) | 81.58456432 |
| 1975 | 95% credible interval upper bound (option 2) | 80.86252951 |
| 1976 | 95% credible interval upper bound (option 2) | 80.38814136 |
| 1977 | 95% credible interval upper bound (option 2) | 79.35221426 |
| 1978 | 95% credible interval upper bound (option 2) | 77.12443193 |
| 1979 | 95% credible interval upper bound (option 2) | 73.80221915 |
| 1980 | 95% credible interval upper bound (option 2) | 70.76487273 |
| 1981 | 95% credible interval upper bound (option 2) | 68.70050975 |
| 1982 | 95% credible interval upper bound (option 2) | 68.05129489 |
| 1983 | 95% credible interval upper bound (option 2) | 67.45510924 |
| 1984 | 95% credible interval upper bound (option 2) | 65.88712071 |
| 1985 | 95% credible interval upper bound (option 2) | 63.58042594 |
| 1986 | 95% credible interval upper bound (option 2) | 60.903086 |
| 1987 | 95% credible interval upper bound (option 2) | 58.49375626 |
| 1988 | 95% credible interval upper bound (option 2) | 56.10378135 |
| 1989 | 95% credible interval upper bound (option 2) | 53.92550668 |
| 1990 | 95% credible interval upper bound (option 2) | 51.85291268 |
| 1991 | 95% credible interval upper bound (option 2) | 49.88627371 |
| 1992 | 95% credible interval upper bound (option 2) | 48.01356385 |
| 1993 | 95% credible interval upper bound (option 2) | 46.01471969 |
| 1994 | 95% credible interval upper bound (option 2) | 43.73272415 |
| 1995 | 95% credible interval upper bound (option 2) | 41.01394948 |
| 1996 | 95% credible interval upper bound (option 2) | 37.97896922 |
| 1997 | 95% credible interval upper bound (option 2) | 35.02336584 |
| 1998 | 95% credible interval upper bound (option 2) | 32.45813112 |
| 1999 | 95% credible interval upper bound (option 2) | 30.45894645 |
| 2000 | 95% credible interval upper bound (option 2) | 29.47591741 |
| 2001 | 95% credible interval upper bound (option 2) | 29.57814756 |
| 2002 | 95% credible interval upper bound (option 2) | 30.33457515 |
| 2003 | 95% credible interval upper bound (option 2) | 30.92266483 |
| 2004 | 95% credible interval upper bound (option 2) | 30.72070738 |
| 2005 | 95% credible interval upper bound (option 2) | 29.96199556 |
| 2006 | 95% credible interval upper bound (option 2) | 29.13221171 |
| 2007 | 95% credible interval upper bound (option 2) | 28.79317393 |
| 2008 | 95% credible interval upper bound (option 2) | 29.07180649 |
| 2009 | 95% credible interval upper bound (option 2) | 29.80701674 |
| 2010 | 95% credible interval upper bound (option 2) | 30.58408471 |
| 2011 | 95% credible interval upper bound (option 2) | 31.0197135 |
| 2012 | 95% credible interval upper bound (option 2) | 30.68163021 |
| 2013 | 95% credible interval upper bound (option 2) | 29.80673435 |
| 2014 | 95% credible interval upper bound (option 2) | 28.65226457 |
| 2015 | 95% credible interval upper bound (option 2) | 27.79395861 |
| 2016 | 95% credible interval upper bound (option 2) | 27.64020078 |
| 2017 | 95% credible interval upper bound (option 2) | 27.86020794 |
| 2018 | 95% credible interval upper bound (option 2) | 28.35242055 |
| 2019 | 95% credible interval upper bound (option 2) | 28.61506207 |
| 2020 | 95% credible interval upper bound (option 2) | 28.79916395 |
| 2021 | 95% credible interval upper bound (option 2) | 28.44264629 |
| 2022 | 95% credible interval upper bound (option 2) | 27.54338838 |
| 2023 | 95% credible interval upper bound (option 2) | 25.95152433 |
| 2024 | 95% credible interval upper bound (option 2) | 23.80827572 |