1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
|
4.88
6.14
5.95
6.39
8.95
9.06
6.06
5.65
10.71
12.06
7.89
6.31
6.96
11.28
13.97
17.74
17.98
15.12
10.17
12.08
9.60
|
4.23
5.07
4.45
5.53
6.58
5.73
4.04
4.02
6.03
7.78
6.25
4.76
5.05
7.18
9.98
8.33
12.65
8.80
8.46
8.85
7.58
|
|
|
|
|
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
|
7.83
8.19
9.28
10.40
8.57
7.17
4.42
3.39
6.78
6.71
5.75
5.90
5.67
6.07
6.94
5.45
2.16
1.30
2.66
4.62
5.54
|
5.70
5.85
6.69
8.12
7.64
4.41
3.17
3.16
3.29
5.49
5.03
5.47
4.99
4.90
6.15
1.90
1.36
1.02
1.09
2.85
4.69
|
|
|
|
|
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
|
5.40
4.37
1.76
0.75
0.67
0.58
0.29
0.13
0.14
0.15
0.19
|
4.85
2.18
.030
0.29
0.30
0.32
0.13
0.13
0.13
0.14
0.15
|
|
|
|
|
|
