Year | Value | 2021 | 63.529 | 2020 | 64.235 | 2019 | 65.186 | 2018 | 64.251 | 2017 | 64.284 | 2016 | 64.264 | 2015 | 63.583 | 2014 | 63.475 | 2013 | 63.082 | 2012 | 63.347 | 2011 | 62.547 | 2010 | 61.642 | 2009 | 61.64 | 2008 | 61.112 | 2007 | 60.569 | 2006 | 60.533 | 2005 | 60.002 | 2004 | 59.627 | 2003 | 59.206 | 2002 | 58.951 | 2001 | 59.078 | 2000 | 59.017 | 1999 | 59.083 | 1998 | 58.792 | 1997 | 58.266 | 1996 | 58.193 | 1995 | 57.676 | 1994 | 56.842 | 1993 | 55.935 | 1992 | 55.011 | 1991 | 54.08 | 1990 | 53.059 | 1989 | 52.303 | 1988 | 51.618 | 1987 | 51.102 | 1986 | 50.329 | 1985 | 49.805 | 1984 | 49.055 | 1983 | 48.433 | 1982 | 47.926 | 1981 | 47.121 | 1980 | 46.673 | 1979 | 46.064 | 1978 | 45.071 | 1977 | 44.841 | 1976 | 44.592 | 1975 | 43.989 | 1974 | 43.51 | 1973 | 42.799 | 1972 | 42.345 | 1971 | 41.702 | 1970 | 41.143 | 1969 | 40.639 | 1968 | 40.142 | 1967 | 39.696 | 1966 | 39.103 | 1965 | 38.733 | 1964 | 38.228 | 1963 | 37.724 | 1962 | 37.183 | 1961 | 36.778 | 1960 | 36.292 |
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