Year | Value | 2022 | 76.875 | 2021 | 76.896 | 2020 | 76.901 | 2019 | 76.893 | 2018 | 76.869 | 2017 | 76.831 | 2016 | 76.778 | 2015 | 76.725 | 2014 | 76.672 | 2013 | 76.618 | 2012 | 76.565 | 2011 | 76.557 | 2010 | 76.611 | 2009 | 76.665 | 2008 | 76.719 | 2007 | 76.773 | 2006 | 76.816 | 2005 | 76.845 | 2004 | 76.873 | 2003 | 76.902 | 2002 | 76.931 | 2001 | 76.959 | 2000 | 76.988 | 1999 | 77.016 | 1998 | 77.045 | 1997 | 77.073 | 1996 | 77.103 | 1995 | 77.136 | 1994 | 77.168 | 1993 | 77.2 | 1992 | 77.232 | 1991 | 77.264 | 1990 | 77.296 | 1989 | 77.328 | 1988 | 77.359 | 1987 | 77.391 | 1986 | 77.504 | 1985 | 77.732 | 1984 | 77.958 | 1983 | 78.183 | 1982 | 78.406 | 1981 | 78.627 | 1980 | 78.846 | 1979 | 79.065 | 1978 | 79.281 | 1977 | 79.496 | 1976 | 79.633 | 1975 | 79.663 | 1974 | 79.693 | 1973 | 79.723 | 1972 | 79.753 | 1971 | 79.783 | 1970 | 79.813 | 1969 | 79.843 | 1968 | 79.873 | 1967 | 79.903 | 1966 | 80.092 | 1965 | 80.501 | 1964 | 80.902 | 1963 | 81.299 | 1962 | 81.688 | 1961 | 82.071 | 1960 | 82.448 |
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