Graph

Common Raven
(Corvus corax)

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	64.6	48.4	95.6
1971	65.6	49.1	97.4
1972	67.4	50.4	99.9
1973	68.1	50.9	102
1974	69.5	52.1	104
1975	70.8	52.8	107
1976	71.9	53.6	109
1977	73.5	54.8	111
1978	74.9	55.5	113
1979	76.1	56.6	117
1980	77.9	57.6	119
1981	80.5	59.8	124
1982	81.7	60.4	128
1983	83.9	62	131
1984	85.6	62.9	136
1985	88.6	65.2	140
1986	90.5	66.3	144
1987	92.8	68	147
1988	96	70	153
1989	98	71.3	158
1990	101	73.1	162
1991	105	75.5	171
1992	107	76.9	179
1993	110	78.6	182
1994	114	81	192
1995	116	81.9	195
1996	120	85	203
1997	124	86.8	213
1998	127	88.4	220
1999	132	91.7	231
2000	138	95.8	241
2001	142	97.7	249
2002	147	99.1	262
2003	151	102	272
2004	157	106	286
2005	161	107	299
2006	168	111	313
2007	177	117	330
2008	184	120	352
2009	190	123	365
2010	198	127	384
2011	206	131	405
2012	214	136	427
2013	221	138	448
2014	228	141	471
2015	241	148	512
2016	249	150	532

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