Year | Value | 2022 | 69.609 | 2021 | 69.415 | 2020 | 69.229 | 2019 | 69.051 | 2018 | 68.88 | 2017 | 68.717 | 2016 | 68.563 | 2015 | 68.416 | 2014 | 68.269 | 2013 | 68.122 | 2012 | 67.974 | 2011 | 67.965 | 2010 | 68.094 | 2009 | 68.223 | 2008 | 68.351 | 2007 | 68.479 | 2006 | 68.607 | 2005 | 68.735 | 2004 | 68.862 | 2003 | 68.989 | 2002 | 69.116 | 2001 | 69.242 | 2000 | 69.368 | 1999 | 69.543 | 1998 | 69.733 | 1997 | 69.923 | 1996 | 70.111 | 1995 | 70.3 | 1994 | 70.487 | 1993 | 70.674 | 1992 | 70.86 | 1991 | 71.046 | 1990 | 71.231 | 1989 | 71.415 | 1988 | 71.39 | 1987 | 71.183 | 1986 | 70.975 | 1985 | 70.767 | 1984 | 70.558 | 1983 | 70.347 | 1982 | 70.136 | 1981 | 69.924 | 1980 | 69.711 | 1979 | 69.497 | 1978 | 69.124 | 1977 | 68.617 | 1976 | 68.106 | 1975 | 67.589 | 1974 | 67.069 | 1973 | 66.545 | 1972 | 66.017 | 1971 | 65.483 | 1970 | 64.947 | 1969 | 64.307 | 1968 | 63.577 | 1967 | 62.839 | 1966 | 62.097 | 1965 | 61.348 | 1964 | 60.596 | 1963 | 59.836 | 1962 | 59.072 | 1961 | 58.304 | 1960 | 57.533 |
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