77%
2016
10
20
30
40
50
60
70
80
90%
54%
1993
60%
1994
69%
1995
72%
1996
78%
1997
81%
1998
83%
1999
83%
2000
86%
2001
88%
2002
85%
2003
81%
2004
81%
2005
84%
2006
89%
2007
91%
2008
87%
2009
85%
2010
87%
2011
84%
2012
79%
2013
75%
2014
79%
2015
77%
2016
