1996
7.6
25.6
23.1
43.7
1997
9.8
29.7
30.7
29.9
1998
15.2
16
27.5
41.3
1999
4.5
17.1
40.3
38.1
2000
16.1
24.9
20
38.9
2001
10.6
23.6
20.7
45.1
2002
10.6
24
22.2
43.1
2003
8.5
13.6
12.6
65.2
2004
20.4
23.9
21.4
34.3
2005
12.7
16.6
25.2
45.4
2006
2.4
7.2
21.7
68.7
2007
23.7
25.3
18.8
32.2
2008
4.7
28.3
31.6
35.4
2009
20.1
33.6
24.1
22.3
2010
15.4
28.8
34.6
21.2
2011
12.6
26.8
42.4
18.2
2012
14.2
32.4
26.3
27.1
2013
19.8
36.6
22.9
20.7