1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
|
1.41
2.73
3.68
4.07
3.29
5.14
5.03
3.18
3.29
3.81
4.02
4.72
5.82
5.71
6.19
8.17
8.10
6.04
5.52
8.82
9.36
7.75
6.52
6.97
10.30
12.44
15.82
|
0.82
1.39
2.49
3.18
1.23
3.36
2.86
2.81
2.98
3.01
3.72
3.94
4.88
4.11
5.41
6.26
5.00
3.69
4.27
5.89
6.88
5.98
4.89
5.29
7.28
9.57
8.16
|
|
|
|
|
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
|
16.72
14.73
10.53
12.08
9.86
7.73
7.67
8.99
9.57
8.40
6.64
4.63
3.61
7.14
7.05
5.85
5.99
5.44
5.84
6.33
4.81
2.57
1.36
2.67
4.35
5.22
5.06
|
12.41
8.91
8.62
9.33
7.67
5.72
5.78
6.64
7.72
7.05
4.38
3.18
3.24
3.54
5.31
4.94
5.46
4.12
4.51
5.60
2.18
1.45
1.01
1.19
2.86
4.45
3.26
|
|
|
|
|
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
|
2.71
0.64
0.45
0.29
0.19
0.16
0.21
0.65
0.87
1.70
|
0.49
0.31
0.23
0.10
0.12
0.12
0.10
0.20
0.51
0.82
|
|
|
|
|
|
