Year | Value | 2021 | 72.767 | 2020 | 72.768 | 2019 | 72.157 | 2018 | 72.636 | 2017 | 72.59 | 2016 | 72.54 | 2015 | 72.515 | 2014 | 72.463 | 2013 | 72.391 | 2012 | 72.167 | 2011 | 72.26 | 2010 | 72.249 | 2009 | 70.066 | 2008 | 72.155 | 2007 | 72.1 | 2006 | 72.021 | 2005 | 71.754 | 2004 | 71.696 | 2003 | 71.496 | 2002 | 71.276 | 2001 | 71.019 | 2000 | 70.746 | 1999 | 70.456 | 1998 | 70.171 | 1997 | 69.875 | 1996 | 69.588 | 1995 | 69.298 | 1994 | 68.98 | 1993 | 68.701 | 1992 | 68.385 | 1991 | 67.881 | 1990 | 67.658 | 1989 | 67.471 | 1988 | 67.188 | 1987 | 66.883 | 1986 | 66.623 | 1985 | 66.347 | 1984 | 66.048 | 1983 | 65.736 | 1982 | 65.419 | 1981 | 65.095 | 1980 | 64.748 | 1979 | 64.39 | 1978 | 63.999 | 1977 | 63.642 | 1976 | 63.214 | 1975 | 62.764 | 1974 | 62.25 | 1973 | 61.747 | 1972 | 61.23 | 1971 | 60.704 | 1970 | 60.18 | 1969 | 59.64 | 1968 | 59.076 | 1967 | 58.553 | 1966 | 57.922 | 1965 | 57.54 | 1964 | 53.601 | 1963 | 56.46 | 1962 | 55.89 | 1961 | 55.315 | 1960 | 54.688 |
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