Year | Value | 2022 | 64.183 | 2021 | 63.912 | 2020 | 63.653 | 2019 | 63.405 | 2018 | 63.17 | 2017 | 62.947 | 2016 | 62.737 | 2015 | 62.538 | 2014 | 62.34 | 2013 | 62.141 | 2012 | 61.942 | 2011 | 61.742 | 2010 | 61.542 | 2009 | 61.342 | 2008 | 61.141 | 2007 | 60.94 | 2006 | 60.738 | 2005 | 60.477 | 2004 | 60.202 | 2003 | 59.925 | 2002 | 59.649 | 2001 | 59.399 | 2000 | 59.155 | 1999 | 58.91 | 1998 | 58.664 | 1997 | 58.419 | 1996 | 58.173 | 1995 | 57.949 | 1994 | 57.731 | 1993 | 57.512 | 1992 | 57.293 | 1991 | 57.073 | 1990 | 56.929 | 1989 | 56.804 | 1988 | 56.678 | 1987 | 56.553 | 1986 | 56.427 | 1985 | 56.275 | 1984 | 56.115 | 1983 | 55.955 | 1982 | 55.794 | 1981 | 55.634 | 1980 | 55.333 | 1979 | 54.994 | 1978 | 54.655 | 1977 | 54.315 | 1976 | 53.975 | 1975 | 53.634 | 1974 | 53.294 | 1973 | 52.952 | 1972 | 52.611 | 1971 | 52.269 | 1970 | 51.276 | 1969 | 50.115 | 1968 | 48.956 | 1967 | 47.795 | 1966 | 46.637 | 1965 | 46.233 | 1964 | 46.023 | 1963 | 45.813 | 1962 | 45.603 | 1961 | 45.393 | 1960 | 45.184 |
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