Year | Value | 2022 | 62.818 | 2021 | 62.496 | 2020 | 62.183 | 2019 | 61.879 | 2018 | 61.585 | 2017 | 61.3 | 2016 | 61.026 | 2015 | 60.75 | 2014 | 60.474 | 2013 | 60.197 | 2012 | 59.907 | 2011 | 59.584 | 2010 | 59.261 | 2009 | 58.937 | 2008 | 58.612 | 2007 | 58.286 | 2006 | 57.96 | 2005 | 57.633 | 2004 | 57.305 | 2003 | 56.977 | 2002 | 56.6 | 2001 | 55.966 | 2000 | 55.331 | 1999 | 54.693 | 1998 | 54.054 | 1997 | 53.414 | 1996 | 52.774 | 1995 | 52.131 | 1994 | 51.488 | 1993 | 50.844 | 1992 | 50.186 | 1991 | 49.439 | 1990 | 48.694 | 1989 | 47.949 | 1988 | 47.207 | 1987 | 46.463 | 1986 | 45.722 | 1985 | 44.983 | 1984 | 44.247 | 1983 | 43.512 | 1982 | 42.785 | 1981 | 42.235 | 1980 | 41.688 | 1979 | 41.141 | 1978 | 40.598 | 1977 | 40.056 | 1976 | 39.518 | 1975 | 38.981 | 1974 | 38.447 | 1973 | 37.916 | 1972 | 37.396 | 1971 | 37.23 | 1970 | 37.065 | 1969 | 36.9 | 1968 | 36.735 | 1967 | 36.571 | 1966 | 36.407 | 1965 | 36.243 | 1964 | 36.079 | 1963 | 35.916 | 1962 | 35.771 | 1961 | 35.67 | 1960 | 35.569 |
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