Year | Value | 2021 | 68.846 | 2020 | 70.166 | 2019 | 70.935 | 2018 | 70.492 | 2017 | 70.516 | 2016 | 69.917 | 2015 | 69.24 | 2014 | 69.031 | 2013 | 69.099 | 2012 | 69.143 | 2011 | 69.192 | 2010 | 69.357 | 2009 | 69.573 | 2008 | 69.394 | 2007 | 68.947 | 2006 | 68.479 | 2005 | 68.169 | 2004 | 67.861 | 2003 | 67.419 | 2002 | 66.938 | 2001 | 66.787 | 2000 | 66.417 | 1999 | 65.561 | 1998 | 65.505 | 1997 | 65.172 | 1996 | 64.241 | 1995 | 65.099 | 1994 | 65.07 | 1993 | 66.543 | 1992 | 66.96 | 1991 | 66.977 | 1990 | 68.067 | 1989 | 68.673 | 1988 | 68.159 | 1987 | 68.121 | 1986 | 67.635 | 1985 | 65.688 | 1984 | 65.68 | 1983 | 65.684 | 1982 | 66.179 | 1981 | 65.613 | 1980 | 65.173 | 1979 | 64.807 | 1978 | 64.523 | 1977 | 64.506 | 1976 | 64.496 | 1975 | 64.348 | 1974 | 64.211 | 1973 | 64.163 | 1972 | 63.949 | 1971 | 63.799 | 1970 | 63.885 | 1969 | 63.873 | 1968 | 63.745 | 1967 | 63.606 | 1966 | 63.392 | 1965 | 63.152 | 1964 | 62.81 | 1963 | 62.355 | 1962 | 61.922 | 1961 | 61.446 | 1960 | 61.074 |
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