Year | Value | 2021 | 60.879 | 2020 | 61.559 | 2019 | 65.37 | 2018 | 65.279 | 2017 | 65.228 | 2016 | 65.17 | 2015 | 64.9 | 2014 | 64.737 | 2013 | 64.57 | 2012 | 64.288 | 2011 | 64.163 | 2010 | 63.821 | 2009 | 63.581 | 2008 | 63.206 | 2007 | 62.859 | 2006 | 62.613 | 2005 | 62.252 | 2004 | 61.916 | 2003 | 61.463 | 2002 | 61.212 | 2001 | 60.836 | 2000 | 60.419 | 1999 | 59.975 | 1998 | 59.537 | 1997 | 59.04 | 1996 | 58.339 | 1995 | 57.82 | 1994 | 57.295 | 1993 | 56.805 | 1992 | 56.165 | 1991 | 55.573 | 1990 | 54.959 | 1989 | 54.34 | 1988 | 53.791 | 1987 | 53.138 | 1986 | 52.649 | 1985 | 52.141 | 1984 | 51.694 | 1983 | 51.081 | 1982 | 50.736 | 1981 | 50.299 | 1980 | 49.814 | 1979 | 49.292 | 1978 | 48.758 | 1977 | 48.222 | 1976 | 47.715 | 1975 | 47.227 | 1974 | 46.931 | 1973 | 46.392 | 1972 | 45.872 | 1971 | 45.438 | 1970 | 44.979 | 1969 | 44.557 | 1968 | 44.059 | 1967 | 43.712 | 1966 | 43.357 | 1965 | 42.962 | 1964 | 42.59 | 1963 | 42.198 | 1962 | 41.972 | 1961 | 41.55 | 1960 | 41.164 |
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