1990
8.09
39.68
8.65
30.95
12.63
0.0
1991
8.48
39.04
8.28
31.31
12.89
0.0
1992
8.99
37.46
8.14
31.77
13.64
0.0
1993
8.06
35.8
9.12
33.1
13.91
0.0
1994
7.86
35.38
10.15
32.44
14.17
0.0
1995
8.16
34.74
10.77
32.36
13.97
0.0
1996
7.73
33.86
12.04
32.81
13.56
0.0
1997
7.24
31.81
13.87
33.1
13.98
0.0
1998
7.33
31.41
14.61
32.17
14.48
0.0
1999
6.74
29.98
16.65
32.19
14.44
0.0
2000
5.73
30.97
16.99
31.4
14.91
0.0
2001
5.15
30.43
17.11
31.73
15.57
0.0
2002
5.5
30.64
17.83
31.84
14.18
0.0
2003
4.67
31.65
18.58
31.15
13.95
0.0
2004
4.11
30.08
19.9
30.9
15.02
0.0
2005
3.9
29.47
21.21
30.39
15.03
0.0
2006
3.63
29.61
21.47
29.73
15.56
0.0
2007
2.96
28.98
23.23
28.24
16.59
0.0
2008
2.81
27.01
24.32
28.21
17.64
0.0
2009
2.73
25.89
23.74
28.24
19.4
0.0
2010
2.26
25.12
23.99
27.8
20.83
0.0
2011
1.93
26.46
22.66
28.28
20.66
0.0