Year | Value | 2021 | 79.082 | 2020 | 78.85 | 2019 | 79.323 | 2018 | 79.21 | 2017 | 79.102 | 2016 | 79.146 | 2015 | 78.941 | 2014 | 78.662 | 2013 | 78.245 | 2012 | 77.947 | 2011 | 77.291 | 2010 | 76.769 | 2009 | 76.099 | 2008 | 75.551 | 2007 | 74.614 | 2006 | 73.985 | 2005 | 73.588 | 2004 | 72.635 | 2003 | 73.183 | 2002 | 72.554 | 2001 | 71.388 | 2000 | 70.16 | 1999 | 69.374 | 1998 | 68.955 | 1997 | 68.582 | 1996 | 68.091 | 1995 | 66.723 | 1994 | 65.784 | 1993 | 65.032 | 1992 | 64.358 | 1991 | 63.681 | 1990 | 63.005 | 1989 | 62.297 | 1988 | 61.596 | 1987 | 60.773 | 1986 | 59.983 | 1985 | 59.244 | 1984 | 58.515 | 1983 | 57.693 | 1982 | 56.913 | 1981 | 56.056 | 1980 | 55.272 | 1979 | 54.333 | 1978 | 50.791 | 1977 | 52.328 | 1976 | 51.3 | 1975 | 50.261 | 1974 | 49.164 | 1973 | 48.042 | 1972 | 46.996 | 1971 | 46.031 | 1970 | 44.991 | 1969 | 44.162 | 1968 | 43.402 | 1967 | 42.589 | 1966 | 41.855 | 1965 | 41.128 | 1964 | 40.389 | 1963 | 39.697 | 1962 | 39.032 | 1961 | 38.495 | 1960 | 38.066 |
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