Year | Value | 2021 | 72.063 | 2020 | 72.14 | 2019 | 71.822 | 2018 | 70.145 | 2017 | 68.481 | 2016 | 65.993 | 2015 | 65.124 | 2014 | 63.153 | 2013 | 63.827 | 2012 | 66.769 | 2011 | 73.305 | 2010 | 73.881 | 2009 | 73.853 | 2008 | 73.551 | 2007 | 73.709 | 2006 | 73.35 | 2005 | 72.769 | 2004 | 72.475 | 2003 | 72.414 | 2002 | 71.939 | 2001 | 71.644 | 2000 | 70.764 | 1999 | 70.425 | 1998 | 70.196 | 1997 | 70.283 | 1996 | 70.347 | 1995 | 70.416 | 1994 | 70.141 | 1993 | 70.193 | 1992 | 70.263 | 1991 | 70.036 | 1990 | 69.817 | 1989 | 69.76 | 1988 | 69.674 | 1987 | 69.295 | 1986 | 69.206 | 1985 | 68.756 | 1984 | 68.924 | 1983 | 67.829 | 1982 | 61.119 | 1981 | 64.372 | 1980 | 66.351 | 1979 | 66.138 | 1978 | 65.806 | 1977 | 63.764 | 1976 | 63.922 | 1975 | 63.538 | 1974 | 63.119 | 1973 | 60.691 | 1972 | 61.9 | 1971 | 61.37 | 1970 | 60.527 | 1969 | 59.878 | 1968 | 59.065 | 1967 | 58.095 | 1966 | 57.598 | 1965 | 57.113 | 1964 | 56.5 | 1963 | 55.778 | 1962 | 55.086 | 1961 | 54.437 | 1960 | 53.547 |
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