Year | Value | 2021 | 63.594 | 2020 | 68.051 | 2019 | 67.891 | 2018 | 67.371 | 2017 | 69.428 | 2016 | 68.059 | 2015 | 66.284 | 2014 | 65.391 | 2013 | 64.637 | 2012 | 62.928 | 2011 | 62.816 | 2010 | 61.829 | 2009 | 60.03 | 2008 | 58.443 | 2007 | 56.99 | 2006 | 55.147 | 2005 | 54.383 | 2004 | 53.276 | 2003 | 52.648 | 2002 | 52.388 | 2001 | 52.448 | 2000 | 52.84 | 1999 | 53.651 | 1998 | 54.662 | 1997 | 55.807 | 1996 | 57.032 | 1995 | 58.225 | 1994 | 59.507 | 1993 | 60.67 | 1992 | 61.862 | 1991 | 63.018 | 1990 | 64.037 | 1989 | 64.846 | 1988 | 65.035 | 1987 | 65.727 | 1986 | 65.785 | 1985 | 65.629 | 1984 | 65.337 | 1983 | 64.838 | 1982 | 64.366 | 1981 | 63.883 | 1980 | 63.357 | 1979 | 62.865 | 1978 | 62.355 | 1977 | 61.768 | 1976 | 61.124 | 1975 | 60.509 | 1974 | 59.89 | 1973 | 59.298 | 1972 | 58.724 | 1971 | 58.183 | 1970 | 57.667 | 1969 | 57.158 | 1968 | 56.673 | 1967 | 56.216 | 1966 | 55.76 | 1965 | 55.284 | 1964 | 54.804 | 1963 | 54.322 | 1962 | 53.828 | 1961 | 53.318 | 1960 | 52.78 |
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