1995
11.1
1996
12.2
1997
13.3
1998
14.6
1999
16.3
2000
25.2
2001
26.6
2002
28.4
2003
29.4
2004
30.6
2005
54.6
2005
31.9
2006
57.0
2006
32.9
2007
59.2
2007
35.1
2008
60.5
2008
36.7
2009
62.4
2009
37.7
2010
63.3
2010
38.5
2011
63.5
2011
39.8
2012
64.4
2012
41.7
2013
65.2
2013
42.4
2014
43.6