Year | Value | 2022 | 74.092 | 2021 | 73.996 | 2020 | 73.915 | 2019 | 73.849 | 2018 | 73.797 | 2017 | 73.761 | 2016 | 73.739 | 2015 | 73.718 | 2014 | 73.696 | 2013 | 73.674 | 2012 | 73.653 | 2011 | 73.631 | 2010 | 73.607 | 2009 | 73.581 | 2008 | 73.556 | 2007 | 73.53 | 2006 | 73.504 | 2005 | 73.478 | 2004 | 73.452 | 2003 | 73.427 | 2002 | 73.401 | 2001 | 73.375 | 2000 | 73.383 | 1999 | 73.438 | 1998 | 73.492 | 1997 | 73.546 | 1996 | 73.6 | 1995 | 73.654 | 1994 | 73.708 | 1993 | 73.762 | 1992 | 73.815 | 1991 | 73.869 | 1990 | 73.926 | 1989 | 73.986 | 1988 | 74.046 | 1987 | 74.107 | 1986 | 74.167 | 1985 | 74.227 | 1984 | 74.286 | 1983 | 74.346 | 1982 | 74.406 | 1981 | 74.466 | 1980 | 74.477 | 1979 | 74.424 | 1978 | 74.37 | 1977 | 74.316 | 1976 | 74.262 | 1975 | 74.208 | 1974 | 74.154 | 1973 | 74.1 | 1972 | 74.046 | 1971 | 73.992 | 1970 | 73.843 | 1969 | 73.561 | 1968 | 73.279 | 1967 | 72.993 | 1966 | 72.706 | 1965 | 72.417 | 1964 | 72.127 | 1963 | 71.834 | 1962 | 71.539 | 1961 | 71.243 | 1960 | 70.924 |
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