Year | Value | 2021 | 67.434 | 2020 | 70.398 | 2019 | 70.961 | 2018 | 70.946 | 2017 | 70.986 | 2016 | 70.826 | 2015 | 70.548 | 2014 | 70.253 | 2013 | 70.179 | 2012 | 69.829 | 2011 | 69.505 | 2010 | 69.202 | 2009 | 68.962 | 2008 | 68.659 | 2007 | 68.334 | 2006 | 67.899 | 2005 | 67.61 | 2004 | 67.46 | 2003 | 67.276 | 2002 | 66.97 | 2001 | 67.106 | 2000 | 67.063 | 1999 | 67.029 | 1998 | 66.974 | 1997 | 66.951 | 1996 | 66.842 | 1995 | 66.779 | 1994 | 66.706 | 1993 | 66.603 | 1992 | 66.468 | 1991 | 66.347 | 1990 | 66.207 | 1989 | 65.819 | 1988 | 65.722 | 1987 | 65.436 | 1986 | 65.096 | 1985 | 64.751 | 1984 | 64.431 | 1983 | 64.05 | 1982 | 63.828 | 1981 | 63.473 | 1980 | 63.192 | 1979 | 62.887 | 1978 | 62.544 | 1977 | 62.337 | 1976 | 62.1 | 1975 | 61.815 | 1974 | 61.588 | 1973 | 61.395 | 1972 | 61.23 | 1971 | 61.09 | 1970 | 60.958 | 1969 | 60.593 | 1968 | 60.352 | 1967 | 60.12 | 1966 | 59.903 | 1965 | 59.684 | 1964 | 59.391 | 1963 | 59.113 | 1962 | 58.818 | 1961 | 58.5 | 1960 | 58.146 |
|