26.88
10
20
30
40
50
53.76
1990
53.67
1991
55.35
1992
52.68
1993
51.65
1994
52.51
1995
53.23
1996
51.96
1997
53.56
1998
53.29
1999
52.54
2000
54.12
2001
52.52
2002
53.72
2003
54.36
2004
54.97
2005
54.6
2006
52.66
2007
54.2
2008
52.89
2009
54.48
2010
50.40
2011
51.73
2012
52.63
2013
48.73
2014
48.14
2015
0
2016
0
2017
0
2018
0
2019
43.01
2020
26.88
2030
