1995
52.8
33.9
16.3
24.2
11.3
13.1
1996
51.6
32.7
16.1
23.9
10.9
11.8
1997
47.8
28.6
14.5
22.8
9.6
10.6
1998
50.0
32.0
20.1
25.0
13.7
14.3
1999
51.1
33.5
24.0
26.4
16.0
17.0
2000
51.4
34.0
26.6
27.8
17.2
18.0
2001
53.2
35.5
24.8
28.3
17.6
16.8
2002
53.3
36.0
27.3
28.1
18.0
16.7
2003
55.3
40.8
29.2
31.2
20.2
19.0
2004
55.9
39.2
30.2
31.3
21.2
20.2
2005
54.7
42.0
33.1
31.4
21.8
20.6
2006
55.0
43.0
33.0
32.0
24.0
21.0
2007
56.0
46.0
44.0
32.0
27.0
23.0
2008
55.0
43.0
43.0
33.0
30.0
24.0