2000
32.4
17.9
25.9
2001
30.1
30.5
22.3
2002
31.5
20.7
23.1
2003
41.8
54.9
31
2004
28.2
19.4
20.6
2005
34
22.7
21.4
2006
16.5
37.8
45.5
18.2
2007
11.5
30.4
21.8
20.7
2008
12.5
23.9
15.3
12.3
2009
8.8
24.4
16.1
14.3
2010
10.8
25.2
17.4
11.7
2011
13.6
29.6
16.1
11.9
2012
11.5
21.9
15.5
8.8
2013
8.6
20.5
16.2
9.2
2014
8.1
16.3
7.3
7.6
2015
7.3
18.6
29.4
8.4
2016
5.6
12.9
12.2
7.2
2017
7.9
17.2
13.9
6.4
2018
3.8
15
34.1
3.6