Year | Value | 2021 | 63.192 | 2020 | 64.052 | 2019 | 64.255 | 2018 | 64.019 | 2017 | 63.854 | 2016 | 63.392 | 2015 | 63.237 | 2014 | 62.987 | 2013 | 62.605 | 2012 | 62.291 | 2011 | 61.623 | 2010 | 46.019 | 2009 | 61.741 | 2008 | 61.332 | 2007 | 61.103 | 2006 | 60.763 | 2005 | 60.415 | 2004 | 58.475 | 2003 | 59.507 | 2002 | 58.855 | 2001 | 58.489 | 2000 | 58.365 | 1999 | 57.961 | 1998 | 57.135 | 1997 | 56.516 | 1996 | 56.154 | 1995 | 55.547 | 1994 | 54.653 | 1993 | 54.35 | 1992 | 53.842 | 1991 | 53.391 | 1990 | 52.975 | 1989 | 52.755 | 1988 | 52.632 | 1987 | 52.239 | 1986 | 51.875 | 1985 | 51.523 | 1984 | 51.123 | 1983 | 50.871 | 1982 | 50.551 | 1981 | 50.268 | 1980 | 49.902 | 1979 | 49.675 | 1978 | 49.428 | 1977 | 49.209 | 1976 | 48.956 | 1975 | 48.681 | 1974 | 48.419 | 1973 | 48.208 | 1972 | 47.945 | 1971 | 47.719 | 1970 | 47.337 | 1969 | 46.915 | 1968 | 46.512 | 1967 | 46.125 | 1966 | 45.594 | 1965 | 45.351 | 1964 | 44.968 | 1963 | 42.769 | 1962 | 44.291 | 1961 | 43.914 | 1960 | 43.499 |
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