Year | Value | 2021 | 65.673 | 2020 | 68.486 | 2019 | 69.124 | 2018 | 68.896 | 2017 | 68.667 | 2016 | 68.384 | 2015 | 68.201 | 2014 | 67.882 | 2013 | 67.473 | 2012 | 67.23 | 2011 | 66.982 | 2010 | 66.743 | 2009 | 66.563 | 2008 | 66.288 | 2007 | 66.254 | 2006 | 65.667 | 2005 | 65.132 | 2004 | 64.93 | 2003 | 64.6 | 2002 | 64.728 | 2001 | 64.788 | 2000 | 64.483 | 1999 | 64.17 | 1998 | 63.9 | 1997 | 63.356 | 1996 | 63.205 | 1995 | 63.136 | 1994 | 63.372 | 1993 | 63.152 | 1992 | 62.787 | 1991 | 62.622 | 1990 | 62.415 | 1989 | 62.238 | 1988 | 62.085 | 1987 | 61.947 | 1986 | 61.797 | 1985 | 61.66 | 1984 | 61.589 | 1983 | 61.491 | 1982 | 61.406 | 1981 | 61.311 | 1980 | 61.229 | 1979 | 61.133 | 1978 | 61.052 | 1977 | 60.955 | 1976 | 60.892 | 1975 | 60.819 | 1974 | 60.76 | 1973 | 60.683 | 1972 | 60.636 | 1971 | 60.555 | 1970 | 60.469 | 1969 | 60.38 | 1968 | 60.256 | 1967 | 60.113 | 1966 | 59.937 | 1965 | 59.742 | 1964 | 59.494 | 1963 | 59.202 | 1962 | 58.864 | 1961 | 58.46 | 1960 | 58.034 |
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