Graph

Great Blue Heron
(Ardea herodias)

Listing of the threshold values that appear on the graph
Population below lowest acceptable level		Goal
0.444		0.592

Listing of the individual data points that make up the graph
Year	Annual Index	Lower limit	Upper limit
1970	0.616	0.52	0.756
1971	0.614	0.524	0.737
1972	0.584	0.497	0.701
1973	0.576	0.496	0.681
1974	0.578	0.501	0.685
1975	0.573	0.495	0.667
1976	0.569	0.496	0.665
1977	0.564	0.494	0.658
1978	0.542	0.475	0.625
1979	0.55	0.484	0.633
1980	0.544	0.479	0.624
1981	0.549	0.485	0.627
1982	0.536	0.477	0.614
1983	0.532	0.474	0.61
1984	0.515	0.458	0.593
1985	0.516	0.459	0.586
1986	0.517	0.465	0.583
1987	0.511	0.46	0.589
1988	0.504	0.453	0.568
1989	0.515	0.463	0.58
1990	0.492	0.445	0.554
1991	0.505	0.456	0.568
1992	0.502	0.453	0.568
1993	0.504	0.454	0.567
1994	0.509	0.457	0.577
1995	0.473	0.428	0.528
1996	0.496	0.442	0.568
1997	0.45	0.407	0.499
1998	0.456	0.412	0.507
1999	0.466	0.422	0.517
2000	0.475	0.432	0.53
2001	0.474	0.425	0.537
2002	0.437	0.394	0.491
2003	0.44	0.394	0.495
2004	0.439	0.392	0.502
2005	0.448	0.401	0.505
2006	0.449	0.403	0.511
2007	0.441	0.391	0.501
2008	0.432	0.384	0.492
2009	0.442	0.392	0.514
2010	0.416	0.37	0.47
2011	0.444	0.391	0.511
2012	0.425	0.374	0.503
2013	0.421	0.37	0.483
2014	0.43	0.374	0.501
2015	0.424	0.369	0.495
2016	0.433	0.378	0.505

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