Created with Raphaël 2.1.2
2.9
5.0
10.0
15.0
20.0
25.0
28.3
1994
19.1
1995
24.4
1996
27.5
1997
1.7
1998
11.7
1999
15.7
2000
24.0
2001
11.1
2002
9.2
2003
3.2
2004
8.3
2005
5.8
2006
5.0
2007
7.5
2008
7.4
2009
1.7
2010
13.3
2011
5.8
2012
5.8
2013
15.0
2014
5.8
2015
1.7
2016
4.1
2017
2.9
2018