Graph

Purple Martin
(Progne subis)

Listing of the individual data points that make up the graph
Year	Annual Index	Lower limit	Upper limit
1970	0.802	0.38	1.98
1971	0.865	0.446	2.01
1972	0.989	0.498	2.44
1973	0.755	0.41	1.59
1974	0.697	0.377	1.44
1975	0.655	0.342	1.33
1976	0.654	0.36	1.27
1977	0.679	0.396	1.45
1978	0.73	0.405	1.51
1979	0.604	0.35	1.16
1980	0.561	0.32	1.05
1981	0.547	0.328	1.02
1982	0.529	0.312	0.958
1983	0.52	0.309	0.954
1984	0.518	0.319	0.972
1985	0.502	0.305	0.92
1986	0.518	0.322	1.01
1987	0.477	0.303	0.875
1988	0.462	0.302	0.82
1989	0.447	0.294	0.762
1990	0.505	0.326	1.02
1991	0.52	0.338	1.08
1992	0.63	0.402	1.42
1993	0.528	0.341	1.11
1994	0.532	0.349	1.17
1995	0.497	0.337	0.972
1996	0.461	0.298	0.917
1997	0.481	0.33	0.927
1998	0.409	0.283	0.669
1999	0.478	0.33	0.894
2000	0.644	0.406	1.68
2001	0.388	0.27	0.592
2002	0.491	0.341	0.896
2003	0.429	0.288	0.734
2004	0.412	0.275	0.69
2005	0.419	0.295	0.649
2006	0.427	0.282	0.691
2007	0.52	0.343	1.01
2008	0.475	0.317	0.838
2009	0.442	0.292	0.727
2010	0.441	0.28	0.729
2011	0.49	0.315	0.899
2012	0.595	0.369	1.17
2013	0.467	0.268	0.81
2014	0.537	0.324	1.01
2015	0.616	0.356	1.19
2016	0.565	0.326	1.06

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