Year | Value | 2021 | 67.298 | 2020 | 67.306 | 2019 | 69.3 | 2018 | 69.2 | 2017 | 69.3 | 2016 | 68.9 | 2015 | 68.6 | 2014 | 67.8 | 2013 | 67.3 | 2012 | 66.6 | 2011 | 64.7 | 2010 | 64.6 | 2009 | 64.7 | 2008 | 64.7 | 2007 | 64.5 | 2006 | 63.6 | 2005 | 62.9 | 2004 | 63.2 | 2003 | 62.7 | 2002 | 62.3 | 2001 | 62.8 | 2000 | 63.4 | 1999 | 62.2 | 1998 | 62.7 | 1997 | 62.9 | 1996 | 63 | 1995 | 62.9 | 1994 | 63.5 | 1993 | 63.8 | 1992 | 64.9 | 1991 | 65.5 | 1990 | 66.3 | 1989 | 66.8 | 1988 | 67 | 1987 | 66.6 | 1986 | 67.33 | 1985 | 66.7 | 1984 | 64.811 | 1983 | 65.309 | 1982 | 65.573 | 1981 | 65.588 | 1980 | 65.756 | 1979 | 65.479 | 1978 | 66.031 | 1977 | 66.17 | 1976 | 66.47 | 1975 | 66.461 | 1974 | 67.082 | 1973 | 67.427 | 1972 | 67.162 | 1971 | 67.54 | 1970 | 66.964 | 1969 | 67.139 | 1968 | 67.304 | 1967 | 67.301 | 1966 | 67.306 | 1965 | 67.097 | 1964 | 67.209 | 1963 | 66.461 | 1962 | 66.055 | 1961 | 66.514 | 1960 | 65.939 |
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