Graph

Willow Ptarmigan
(Lagopus lagopus)

Additional information on: Christmas Bird Count (CBC)

Listing of the individual data points that make up the graph
Year	Annual Index	Lower CI	Upper CI
1965
1966
1967
1968
1969
1970	13.8	1.14	172
1971	13.4	1.17	161
1972	13.2	1.18	158
1973	13	1.18	149
1974	12.9	1.23	140
1975	12.5	1.29	135
1976	12.7	1.3	131
1977	12.6	1.37	123
1978	11.9	1.34	110
1979	11.5	1.29	102
1980	11.7	1.38	105
1981	11.3	1.35	95.2
1982	11.8	1.45	101
1983	10.7	1.32	87.9
1984	10.6	1.37	82.8
1985	11.6	1.55	96.2
1986	10.4	1.43	78.7
1987	11	1.57	83.3
1988	10.2	1.47	72.7
1989	10.2	1.51	73.5
1990	9.87	1.5	69
1991	9.65	1.47	66
1992	9.87	1.52	67.2
1993	9.72	1.58	65
1994	9.4	1.53	62.8
1995	9.47	1.59	61.8
1996	9.8	1.64	65.2
1997	9.71	1.66	62.8
1998	9.55	1.66	60.5
1999	9.85	1.72	61.9
2000	9.34	1.66	57.4
2001	9.05	1.6	55.1
2002	8.63	1.53	52.2
2003	9.22	1.66	55.4
2004	8.7	1.56	52.9
2005	8.68	1.51	51.2
2006	9.14	1.71	55.7
2007	9.22	1.71	56.2
2008	9.75	1.77	62.1
2009	9.8	1.75	62.5
2010	9.52	1.78	58.4
2011	9.56	1.71	58
2012	9.75	1.8	59.1

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