Year | Value | 2021 | 64.183 | 2020 | 64.373 | 2019 | 64.921 | 2018 | 64.475 | 2017 | 63.862 | 2016 | 63.172 | 2015 | 62.381 | 2014 | 61.589 | 2013 | 60.718 | 2012 | 59.931 | 2011 | 59.094 | 2010 | 58.35 | 2009 | 57.571 | 2008 | 56.739 | 2007 | 56.161 | 2006 | 55.635 | 2005 | 55.151 | 2004 | 54.433 | 2003 | 53.712 | 2002 | 52.632 | 2001 | 51.945 | 2000 | 51.203 | 1999 | 50.477 | 1998 | 49.773 | 1997 | 49.322 | 1996 | 49.141 | 1995 | 49.038 | 1994 | 48.857 | 1993 | 48.996 | 1992 | 48.977 | 1991 | 49.289 | 1990 | 49.549 | 1989 | 49.606 | 1988 | 49.752 | 1987 | 49.533 | 1986 | 49.456 | 1985 | 49.301 | 1984 | 49.243 | 1983 | 49.317 | 1982 | 49.34 | 1981 | 49.253 | 1980 | 49.084 | 1979 | 48.883 | 1978 | 48.346 | 1977 | 47.886 | 1976 | 47.304 | 1975 | 46.776 | 1974 | 46.321 | 1973 | 46.015 | 1972 | 45.507 | 1971 | 44.996 | 1970 | 44.512 | 1969 | 44.126 | 1968 | 43.636 | 1967 | 43.16 | 1966 | 42.924 | 1965 | 42.638 | 1964 | 42.471 | 1963 | 42.192 | 1962 | 42.05 | 1961 | 41.834 | 1960 | 41.687 |
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