Year | Value | 2021 | 65.426 | 2020 | 66.166 | 2019 | 66.126 | 2018 | 66.031 | 2017 | 66.008 | 2016 | 65.446 | 2015 | 64.915 | 2014 | 65.536 | 2013 | 65.609 | 2012 | 65.809 | 2011 | 65.678 | 2010 | 65.536 | 2009 | 65.298 | 2008 | 65.16 | 2007 | 65.084 | 2006 | 65.074 | 2005 | 64.776 | 2004 | 64.546 | 2003 | 64.247 | 2002 | 63.738 | 2001 | 64.273 | 2000 | 64.181 | 1999 | 64.577 | 1998 | 64.488 | 1997 | 64.306 | 1996 | 64.218 | 1995 | 64.077 | 1994 | 63.897 | 1993 | 63.715 | 1992 | 63.583 | 1991 | 63.349 | 1990 | 63.204 | 1989 | 62.958 | 1988 | 62.791 | 1987 | 62.593 | 1986 | 62.349 | 1985 | 62.275 | 1984 | 61.687 | 1983 | 61.133 | 1982 | 60.714 | 1981 | 60.644 | 1980 | 60.546 | 1979 | 60.634 | 1978 | 60.174 | 1977 | 59.911 | 1976 | 59.62 | 1975 | 59.562 | 1974 | 59.437 | 1973 | 58.689 | 1972 | 59.461 | 1971 | 59.574 | 1970 | 59.533 | 1969 | 59.399 | 1968 | 59.805 | 1967 | 59.768 | 1966 | 59.371 | 1965 | 59.173 | 1964 | 58.617 | 1963 | 58.159 | 1962 | 57.673 | 1961 | 57.124 | 1960 | 56.804 |
|