Graph

American Bittern
(Botaurus lentiginosus)

Listing of the individual data points that make up the graph
Year	Annual Index	Lower limit	Upper limit
1970	1.6	0.859	2.96
1971	2.36	1.43	4.11
1972	1.86	1.15	3.23
1973	1.88	1.1	3.57
1974	2.84	1.77	4.91
1975	2.98	1.82	5.08
1976	2.27	1.3	4.27
1977	1.12	0.649	2.06
1978	0.984	0.56	1.75
1979	2	1.16	3.72
1980	0.802	0.412	1.51
1981	0.989	0.523	1.85
1982	0.989	0.533	1.94
1983	1.31	0.707	2.41
1984	1.36	0.728	2.68
1985	1.48	0.789	3.04
1986	1.35	0.734	2.54
1987	1.25	0.712	2.12
1988	0.664	0.336	1.35
1989	0.466	0.242	0.856
1990	1.19	0.76	1.96
1991	1.02	0.599	1.75
1992	1.1	0.71	1.73
1993	0.627	0.367	1.07
1994	1.29	0.789	2.21
1995	1	0.618	1.55
1996	0.893	0.546	1.45
1997	1.42	0.891	2.29
1998	1.12	0.689	1.81
1999	1.86	1.17	2.89
2000	1.3	0.827	2.03
2001	1.19	0.743	1.9
2002	0.681	0.372	1.2
2003	1.09	0.656	1.83
2004	1.06	0.63	1.72
2005	1.36	0.861	2.17
2006	1	0.641	1.6
2007	1.18	0.715	2.01
2008	1.2	0.735	2
2009	0.793	0.481	1.31
2010	1.35	0.845	2.22
2011	2.43	1.51	4.04
2012	1.87	1.14	3.22
2013	2.14	1.28	3.78
2014	1.65	1.03	2.77
2015	1.61	1.01	2.72
2016	1.52	0.907	2.66

Notes on numeric data: Ex represents 10 to the power of x; For example 1.2345E-2 is equivalent to 0.012345