Year | Value | 2021 | 70.831 | 2020 | 70.793 | 2019 | 70.625 | 2018 | 70.307 | 2017 | 70.154 | 2016 | 69.854 | 2015 | 69.743 | 2014 | 69.473 | 2013 | 68.694 | 2012 | 67.898 | 2011 | 67.131 | 2010 | 66.5 | 2009 | 65.712 | 2008 | 65.029 | 2007 | 64.907 | 2006 | 64.969 | 2005 | 65.036 | 2004 | 65.056 | 2003 | 65.031 | 2002 | 57.177 | 2001 | 57.052 | 2000 | 56.987 | 1999 | 56.932 | 1998 | 56.898 | 1997 | 56.87 | 1996 | 56.798 | 1995 | 56.659 | 1994 | 65.105 | 1993 | 66.024 | 1992 | 65.655 | 1991 | 65.322 | 1990 | 65.374 | 1989 | 65.377 | 1988 | 65.297 | 1987 | 65.087 | 1986 | 64.914 | 1985 | 64.598 | 1984 | 64.229 | 1983 | 63.831 | 1982 | 63.442 | 1981 | 63.041 | 1980 | 62.652 | 1979 | 62.283 | 1978 | 61.917 | 1977 | 61.502 | 1976 | 61.061 | 1975 | 60.466 | 1974 | 59.984 | 1973 | 59.489 | 1972 | 59 | 1971 | 58.466 | 1970 | 57.921 | 1969 | 57.379 | 1968 | 56.668 | 1967 | 55.96 | 1966 | 55.239 | 1965 | 54.524 | 1964 | 53.891 | 1963 | 53.39 | 1962 | 52.865 | 1961 | 52.465 | 1960 | 52.117 |
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