Year | Value | 2022 | 72.032 | 2021 | 72.274 | 2020 | 72.494 | 2019 | 72.691 | 2018 | 72.866 | 2017 | 73.018 | 2016 | 73.149 | 2015 | 73.258 | 2014 | 73.345 | 2013 | 73.411 | 2012 | 73.455 | 2011 | 73.479 | 2010 | 73.48 | 2009 | 73.482 | 2008 | 73.484 | 2007 | 73.486 | 2006 | 73.488 | 2005 | 73.49 | 2004 | 73.492 | 2003 | 73.493 | 2002 | 73.495 | 2001 | 73.497 | 2000 | 73.499 | 1999 | 73.24 | 1998 | 72.72 | 1997 | 72.194 | 1996 | 71.662 | 1995 | 71.123 | 1994 | 70.579 | 1993 | 70.028 | 1992 | 69.473 | 1991 | 68.91 | 1990 | 68.342 | 1989 | 67.769 | 1988 | 67.39 | 1987 | 67.182 | 1986 | 66.974 | 1985 | 66.765 | 1984 | 66.555 | 1983 | 66.345 | 1982 | 66.134 | 1981 | 65.922 | 1980 | 65.711 | 1979 | 65.498 | 1978 | 65.257 | 1977 | 64.994 | 1976 | 64.73 | 1975 | 64.464 | 1974 | 64.198 | 1973 | 63.93 | 1972 | 63.663 | 1971 | 63.393 | 1970 | 63.124 | 1969 | 63.223 | 1968 | 63.632 | 1967 | 64.04 | 1966 | 64.445 | 1965 | 64.848 | 1964 | 65.249 | 1963 | 65.649 | 1962 | 66.045 | 1961 | 66.44 | 1960 | 66.832 |
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