Year | Value | 2021 | 69.104 | 2020 | 72.118 | 2019 | 72.658 | 2018 | 72.439 | 2017 | 72.207 | 2016 | 71.882 | 2015 | 71.632 | 2014 | 71.316 | 2013 | 71.118 | 2012 | 70.814 | 2011 | 70.518 | 2010 | 70.237 | 2009 | 70.022 | 2008 | 69.799 | 2007 | 69.776 | 2006 | 69.17 | 2005 | 68.675 | 2004 | 68.504 | 2003 | 68.004 | 2002 | 68.141 | 2001 | 68.342 | 2000 | 68.01 | 1999 | 67.612 | 1998 | 67.552 | 1997 | 67.043 | 1996 | 66.731 | 1995 | 66.494 | 1994 | 66.646 | 1993 | 66.381 | 1992 | 66.045 | 1991 | 65.65 | 1990 | 65.422 | 1989 | 65.216 | 1988 | 65.033 | 1987 | 64.88 | 1986 | 64.682 | 1985 | 64.502 | 1984 | 64.345 | 1983 | 64.235 | 1982 | 64.164 | 1981 | 64.04 | 1980 | 63.962 | 1979 | 63.814 | 1978 | 63.709 | 1977 | 63.578 | 1976 | 63.491 | 1975 | 63.417 | 1974 | 63.348 | 1973 | 63.254 | 1972 | 63.204 | 1971 | 63.1 | 1970 | 63.002 | 1969 | 62.89 | 1968 | 62.77 | 1967 | 62.628 | 1966 | 62.444 | 1965 | 62.257 | 1964 | 62.019 | 1963 | 61.72 | 1962 | 61.404 | 1961 | 61.069 | 1960 | 60.633 |
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