Year
|
All common birds (168 species)
|
Common farmland birds (39 species)
|
Common forest birds (34 species)
|
1990
|
100
|
100
|
100
|
1991
|
100.16
|
98.71
|
100.49
|
1992
|
100.26
|
97.46
|
100.74
|
1993
|
100.39
|
96.41
|
100.82
|
1994
|
100.48
|
95.41
|
100.78
|
1995
|
100.49
|
94.36
|
100.64
|
1996
|
100.36
|
93.11
|
100.45
|
1997
|
99.98
|
91.59
|
99.97
|
1998
|
99.41
|
89.87
|
99.07
|
1999
|
99.34
|
88.06
|
97.96
|
2000
|
97.72
|
86.25
|
96.83
|
2001
|
96.95
|
84.57
|
95.88
|
2002
|
96.34
|
83.09
|
95.28
|
2003
|
95.83
|
81.73
|
94.93
|
2004
|
95.32
|
80.42
|
94.66
|
2005
|
94.84
|
79.18
|
94.48
|
2006
|
94.41
|
78.4
|
94.42
|
2007
|
94.06
|
77.06
|
94.52
|
2008
|
93.8
|
76.2
|
94.75
|
2009
|
93.57
|
75.41
|
95.11
|
2010
|
93.38
|
74.71
|
95.58
|
2011
|
93.24
|
74.09
|
96.17
|
2012
|
93.15
|
73.56
|
96.87
|
2013
|
93.09
|
73.11
|
97.7
|
2014
|
93.08
|
72.75
|
98.65
|
2015
|
93.13
|
72.48
|
99.74
|
2016
|
93.21
|
72.27
|
100.95
|
2017
|
93.33
|
72.14
|
102.32
|
2018
|
93.45
|
72.01
|
103.71
|
2019
|
93.57
|
71.88
|
105.12
|