Year | Value | 2021 | 72.659 | 2020 | 73.648 | 2019 | 73.465 | 2018 | 73.293 | 2017 | 73.099 | 2016 | 72.927 | 2015 | 72.75 | 2014 | 72.883 | 2013 | 72.735 | 2012 | 72.595 | 2011 | 72.341 | 2010 | 72.091 | 2009 | 71.953 | 2008 | 72.148 | 2007 | 72.144 | 2006 | 72.078 | 2005 | 71.935 | 2004 | 71.695 | 2003 | 71.563 | 2002 | 71.403 | 2001 | 71.158 | 2000 | 70.57 | 1999 | 70.047 | 1998 | 69.943 | 1997 | 70.074 | 1996 | 70.147 | 1995 | 70.219 | 1994 | 70.027 | 1993 | 69.709 | 1992 | 69.351 | 1991 | 69.368 | 1990 | 69.249 | 1989 | 69.029 | 1988 | 68.81 | 1987 | 68.602 | 1986 | 68.409 | 1985 | 68.37 | 1984 | 67.939 | 1983 | 67.602 | 1982 | 67.307 | 1981 | 66.919 | 1980 | 66.381 | 1979 | 65.966 | 1978 | 65.495 | 1977 | 65.04 | 1976 | 64.831 | 1975 | 64.268 | 1974 | 63.799 | 1973 | 63.248 | 1972 | 62.726 | 1971 | 62.252 | 1970 | 61.793 | 1969 | 61.332 | 1968 | 60.876 | 1967 | 60.534 | 1966 | 60.085 | 1965 | 59.602 | 1964 | 58.801 | 1963 | 58.053 | 1962 | 57.217 | 1961 | 56.216 | 1960 | 55.292 |
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