Year | Value | 2021 | 79.359 | 2020 | 79.21 | 2019 | 79.123 | 2018 | 78.958 | 2017 | 78.841 | 2016 | 78.724 | 2015 | 78.591 | 2014 | 78.436 | 2013 | 78.213 | 2012 | 78.031 | 2011 | 77.869 | 2010 | 77.68 | 2009 | 77.819 | 2008 | 77.576 | 2007 | 77.497 | 2006 | 77.2 | 2005 | 76.942 | 2004 | 76.835 | 2003 | 76.668 | 2002 | 76.481 | 2001 | 76.425 | 2000 | 76.368 | 1999 | 76.481 | 1998 | 76.276 | 1997 | 76.129 | 1996 | 76.138 | 1995 | 75.89 | 1994 | 75.882 | 1993 | 75.813 | 1992 | 75.371 | 1991 | 75.286 | 1990 | 75.15 | 1989 | 75.192 | 1988 | 75.083 | 1987 | 75.035 | 1986 | 74.926 | 1985 | 74.746 | 1984 | 74.96 | 1983 | 74.844 | 1982 | 74.506 | 1981 | 74.363 | 1980 | 74.281 | 1979 | 73.695 | 1978 | 73.251 | 1977 | 72.871 | 1976 | 72.27 | 1975 | 72.011 | 1974 | 71.633 | 1973 | 71.362 | 1972 | 71.098 | 1971 | 70.782 | 1970 | 70.379 | 1969 | 70.586 | 1968 | 70.149 | 1967 | 70.019 | 1966 | 69.8 | 1965 | 69.326 | 1964 | 68.924 | 1963 | 68.373 | 1962 | 67.708 | 1961 | 67.113 | 1960 | 66.249 |
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