Year | Value | 2021 | 62.546 | 2020 | 63.785 | 2019 | 63.572 | 2018 | 63.407 | 2017 | 62.842 | 2016 | 62.683 | 2015 | 62.535 | 2014 | 62.095 | 2013 | 61.899 | 2012 | 61.247 | 2011 | 60.989 | 2010 | 60.573 | 2009 | 60.333 | 2008 | 55.207 | 2007 | 59.578 | 2006 | 59.14 | 2005 | 58.619 | 2004 | 58.311 | 2003 | 57.875 | 2002 | 57.733 | 2001 | 57.314 | 2000 | 57.179 | 1999 | 56.797 | 1998 | 56.705 | 1997 | 56.271 | 1996 | 56.063 | 1995 | 55.559 | 1994 | 55.284 | 1993 | 55.023 | 1992 | 54.823 | 1991 | 54.542 | 1990 | 54.286 | 1989 | 54.16 | 1988 | 53.693 | 1987 | 53.726 | 1986 | 53.435 | 1985 | 53.383 | 1984 | 53.099 | 1983 | 52.937 | 1982 | 52.635 | 1981 | 52.491 | 1980 | 52.081 | 1979 | 51.705 | 1978 | 51.316 | 1977 | 51.093 | 1976 | 50.833 | 1975 | 50.483 | 1974 | 50.092 | 1973 | 49.706 | 1972 | 49.52 | 1971 | 49.123 | 1970 | 48.643 | 1969 | 48.29 | 1968 | 48.024 | 1967 | 47.394 | 1966 | 46.561 | 1965 | 45.597 | 1964 | 44.754 | 1963 | 44.025 | 1962 | 43.421 | 1961 | 42.789 | 1960 | 42.391 |
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