Year | Value | 2021 | 62.481 | 2020 | 65.075 | 2019 | 65.806 | 2018 | 65.503 | 2017 | 65.303 | 2016 | 65.082 | 2015 | 64.98 | 2014 | 64.689 | 2013 | 64.158 | 2012 | 63.972 | 2011 | 63.766 | 2010 | 63.564 | 2009 | 63.412 | 2008 | 63.099 | 2007 | 63.06 | 2006 | 62.5 | 2005 | 61.949 | 2004 | 61.733 | 2003 | 61.538 | 2002 | 61.653 | 2001 | 61.607 | 2000 | 61.325 | 1999 | 61.076 | 1998 | 60.657 | 1997 | 60.1 | 1996 | 60.066 | 1995 | 60.12 | 1994 | 60.414 | 1993 | 60.231 | 1992 | 59.853 | 1991 | 59.867 | 1990 | 59.683 | 1989 | 59.532 | 1988 | 59.406 | 1987 | 59.284 | 1986 | 59.174 | 1985 | 59.074 | 1984 | 59.07 | 1983 | 58.984 | 1982 | 58.892 | 1981 | 58.821 | 1980 | 58.737 | 1979 | 58.683 | 1978 | 58.621 | 1977 | 58.554 | 1976 | 58.509 | 1975 | 58.439 | 1974 | 58.388 | 1973 | 58.325 | 1972 | 58.28 | 1971 | 58.216 | 1970 | 58.138 | 1969 | 58.063 | 1968 | 57.932 | 1967 | 57.783 | 1966 | 57.61 | 1965 | 57.405 | 1964 | 57.148 | 1963 | 56.859 | 1962 | 56.502 | 1961 | 56.044 | 1960 | 55.62 |
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