Year | Value | 2021 | 75.696 | 2020 | 77.02 | 2019 | 76.645 | 2018 | 75.829 | 2017 | 74.293 | 2016 | 74.048 | 2015 | 73.684 | 2014 | 73.283 | 2013 | 72.884 | 2012 | 72.46 | 2011 | 71.694 | 2010 | 71.843 | 2009 | 71.472 | 2008 | 71.103 | 2007 | 70.796 | 2006 | 70.436 | 2005 | 70.15 | 2004 | 69.929 | 2003 | 69.344 | 2002 | 68.112 | 2001 | 67.189 | 2000 | 65.86 | 1999 | 65.189 | 1998 | 64.492 | 1997 | 63.665 | 1996 | 63.126 | 1995 | 63.214 | 1994 | 63.224 | 1993 | 62.847 | 1992 | 62.442 | 1991 | 62.004 | 1990 | 61.509 | 1989 | 61.054 | 1988 | 60.549 | 1987 | 60.047 | 1986 | 59.521 | 1985 | 59.521 | 1984 | 59.212 | 1983 | 58.72 | 1982 | 58.214 | 1981 | 58.069 | 1980 | 57.982 | 1979 | 57.856 | 1978 | 57.782 | 1977 | 57.664 | 1976 | 57.515 | 1975 | 57.583 | 1974 | 57.152 | 1973 | 56.579 | 1972 | 55.964 | 1971 | 55.386 | 1970 | 54.746 | 1969 | 53.991 | 1968 | 53.337 | 1967 | 52.769 | 1966 | 52.04 | 1965 | 51.518 | 1964 | 50.838 | 1963 | 50.078 | 1962 | 49.2 | 1961 | 48.249 | 1960 | 47.24 |
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