17.1%
2018
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0%
11.8%
1995
13.1%
1996
14.6%
1997
13.9%
1998
12.2%
1999
13.0%
2000
11.4%
2001
14.6%
2002
12.0%
2003
11.1%
2004
9.5%
2005
8.8%
2006
8.4%
2007
8.1%
2008
14.8%
2009
14.2%
2010
11.8%
2011
15.2%
2012
16.3%
2013
16.9%
2014
18.5%
2015
18.1%
2016
17.4%
2017
17.1%
2018
