Year | Value | 2021 | 77.462 | 2020 | 76.056 | 2019 | 79.953 | 2018 | 79.604 | 2017 | 79.395 | 2016 | 79.137 | 2015 | 79.209 | 2014 | 79.124 | 2013 | 78.997 | 2012 | 78.842 | 2011 | 78.675 | 2010 | 78.488 | 2009 | 78.308 | 2008 | 78.116 | 2007 | 77.947 | 2006 | 77.747 | 2005 | 77.534 | 2004 | 77.285 | 2003 | 76.997 | 2002 | 76.663 | 2001 | 76.329 | 2000 | 75.964 | 1999 | 75.618 | 1998 | 75.209 | 1997 | 74.857 | 1996 | 74.541 | 1995 | 74.228 | 1994 | 73.954 | 1993 | 73.533 | 1992 | 73.334 | 1991 | 72.822 | 1990 | 72.512 | 1989 | 71.825 | 1988 | 71 | 1987 | 70.098 | 1986 | 69.187 | 1985 | 68.341 | 1984 | 67.605 | 1983 | 66.879 | 1982 | 66.402 | 1981 | 65.902 | 1980 | 65.38 | 1979 | 64.825 | 1978 | 64.22 | 1977 | 63.562 | 1976 | 62.831 | 1975 | 62.116 | 1974 | 61.364 | 1973 | 60.627 | 1972 | 59.956 | 1971 | 59.356 | 1970 | 58.854 | 1969 | 58.337 | 1968 | 58.16 | 1967 | 57.876 | 1966 | 57.6 | 1965 | 57.319 | 1964 | 56.96 | 1963 | 56.538 | 1962 | 56.052 | 1961 | 55.538 | 1960 | 54.995 |
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