Graph

Double-crested Cormorant
(Phalacrocorax auritus)

Additional information on: Christmas Bird Count (CBC)

Listing of the individual data points that make up the graph
Year	Annual index	Lower limit	Upper limit
1970	5.8	2.9	11.4
1971	5.89	2.94	11.5
1972	6.06	3.01	11.8
1973	6.21	3.12	12.1
1974	6.37	3.22	12.3
1975	6.69	3.45	12.9
1976	6.83	3.52	13.1
1977	6.93	3.56	13.4
1978	7.07	3.63	13.7
1979	7.38	3.82	14.1
1980	7.8	4.04	14.9
1981	7.74	4.01	14.8
1982	8.13	4.25	15.4
1983	8.36	4.41	15.9
1984	8.37	4.31	15.8
1985	8.71	4.57	16.4
1986	9	4.72	17
1987	9.11	4.71	17.2
1988	9.66	5.04	18.1
1989	10.1	5.33	19.1
1990	9.97	5.23	18.7
1991	10.5	5.56	19.7
1992	10.8	5.67	20.4
1993	11.4	6.03	21.1
1994	11.5	6.11	21.5
1995	11.8	6.23	22.2
1996	11.9	6.29	22.3
1997	12.2	6.43	22.8
1998	12.6	6.71	23.5
1999	13.1	7.03	24.2
2000	13.6	7.29	25.4
2001	14.3	7.64	26.8
2002	15.2	8.07	28.9
2003	15.3	8.19	28.1
2004	15.9	8.44	29.8
2005	15.9	8.4	29.5
2006	16.4	8.9	30.5
2007	16.4	8.61	30.6
2008	16.1	8.39	30.1
2009	17.2	9.06	32.4
2010	17.6	9.28	32.8
2011	18.6	9.93	34.5
2012	18.9	9.94	35.3
2013	19.3	10.2	36.4
2014	20.5	10.8	38.1
2015	20.1	10.6	37.6
2016	19.9	10.3	37.8

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