Year | Value | 2021 | 64.364 | 2020 | 64.532 | 2019 | 65.687 | 2018 | 65.31 | 2017 | 65.083 | 2016 | 64.768 | 2015 | 64.485 | 2014 | 64.155 | 2013 | 63.911 | 2012 | 63.578 | 2011 | 63.346 | 2010 | 63.105 | 2009 | 62.8 | 2008 | 62.399 | 2007 | 62.228 | 2006 | 61.891 | 2005 | 61.656 | 2004 | 61.593 | 2003 | 61.347 | 2002 | 61.268 | 2001 | 61.185 | 2000 | 61.028 | 1999 | 60.819 | 1998 | 60.609 | 1997 | 60.452 | 1996 | 60.063 | 1995 | 60.259 | 1994 | 60.336 | 1993 | 60.379 | 1992 | 60.261 | 1991 | 59.936 | 1990 | 59.77 | 1989 | 59.322 | 1988 | 59.141 | 1987 | 58.581 | 1986 | 57.992 | 1985 | 57.575 | 1984 | 57.16 | 1983 | 56.682 | 1982 | 56.275 | 1981 | 55.662 | 1980 | 55.061 | 1979 | 54.474 | 1978 | 53.855 | 1977 | 53.37 | 1976 | 52.917 | 1975 | 52.65 | 1974 | 52.184 | 1973 | 51.898 | 1972 | 51.656 | 1971 | 51.387 | 1970 | 51.038 | 1969 | 50.633 | 1968 | 50.038 | 1967 | 49.366 | 1966 | 48.728 | 1965 | 48.059 | 1964 | 47.446 | 1963 | 46.689 | 1962 | 46.049 | 1961 | 45.44 | 1960 | 44.767 |
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