Year | Value | 2021 | 76.398 | 2020 | 76.308 | 2019 | 76.448 | 2018 | 76.086 | 2017 | 75.664 | 2016 | 75.176 | 2015 | 74.777 | 2014 | 74.39 | 2013 | 73.976 | 2012 | 73.525 | 2011 | 73.023 | 2010 | 72.485 | 2009 | 72.142 | 2008 | 71.757 | 2007 | 71.34 | 2006 | 70.876 | 2005 | 70.398 | 2004 | 69.869 | 2003 | 69.593 | 2002 | 69.239 | 2001 | 68.902 | 2000 | 68.529 | 1999 | 68.126 | 1998 | 67.683 | 1997 | 67.268 | 1996 | 66.875 | 1995 | 66.385 | 1994 | 65.986 | 1993 | 65.495 | 1992 | 64.972 | 1991 | 64.52 | 1990 | 64.019 | 1989 | 63.464 | 1988 | 62.864 | 1987 | 62.207 | 1986 | 61.513 | 1985 | 60.722 | 1984 | 59.872 | 1983 | 59.067 | 1982 | 58.207 | 1981 | 57.297 | 1980 | 56.423 | 1979 | 55.467 | 1978 | 54.564 | 1977 | 53.72 | 1976 | 52.936 | 1975 | 52.258 | 1974 | 51.701 | 1973 | 51.206 | 1972 | 50.77 | 1971 | 50.319 | 1970 | 49.848 | 1969 | 49.344 | 1968 | 48.784 | 1967 | 48.172 | 1966 | 47.522 | 1965 | 46.923 | 1964 | 46.322 | 1963 | 45.737 | 1962 | 45.196 | 1961 | 44.693 | 1960 | 42.761 |
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