Figure 6.1: Trends for the abundance of all species of butterflies resident in the UK, 1976 to 2022


Trends for the abundance of all species of butterflies resident in the UK, 1976 to 2022
Year	Unsmoothed index (1976 = 100)	Smoothed index	Smoothed index lower 95% confidence interval	Smoothed index upper 95% confidence interval
1976	100.00	65.47	60.25	70.70
1977	39.17	65.26	60.20	70.31
1978	56.10	65.05	60.16	69.94
1979	60.53	64.83	60.11	69.56
1980	56.23	64.62	60.05	69.19
1981	38.90	64.41	60.00	68.81
1982	71.29	64.19	59.94	68.45
1983	63.97	63.98	59.88	68.08
1984	85.31	63.77	59.81	67.72
1985	62.95	63.55	59.74	67.36
1986	58.48	63.34	59.66	67.01
1987	58.88	63.12	59.58	66.67
1988	50.70	62.91	59.49	66.33
1989	66.83	62.70	59.40	65.99
1990	71.29	62.48	59.30	65.67
1991	67.61	62.27	59.19	65.35
1992	84.72	62.06	59.07	65.04
1993	56.49	61.84	58.94	64.75
1994	61.94	61.63	58.80	64.46
1995	72.28	61.42	58.65	64.18
1996	72.95	61.20	58.48	63.92
1997	76.21	60.99	58.31	63.67
1998	53.95	60.78	58.11	63.44
1999	53.58	60.56	57.91	63.22
2000	56.49	60.35	57.69	63.01
2001	53.33	60.14	57.45	62.82
2002	51.88	59.92	57.20	62.64
2003	62.95	59.71	56.94	62.48
2004	66.07	59.50	56.66	62.33
2005	60.53	59.28	56.38	62.18
2006	66.22	59.07	56.08	62.06
2007	45.60	58.85	55.77	61.94
2008	42.46	58.64	55.45	61.83
2009	56.49	58.43	55.13	61.73
2010	66.22	58.21	54.80	61.63
2011	63.10	58.00	54.45	61.55
2012	36.81	57.79	54.11	61.46
2013	59.84	57.57	53.76	61.39
2014	60.39	57.36	53.40	61.32
2015	54.08	57.15	53.04	61.25
2016	42.95	56.93	52.68	61.19
2017	50.58	56.72	52.31	61.13
2018	67.61	56.51	51.94	61.07
2019	66.22	56.29	51.56	61.02
2020	62.81	56.08	51.19	60.97
2021	56.36	55.87	50.81	60.92
2022	56.36	55.65	50.43	60.88

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