Year | Value | 2021 | 65.672 | 2020 | 66.797 | 2019 | 66.61 | 2018 | 66.465 | 2017 | 65.843 | 2016 | 65.685 | 2015 | 65.561 | 2014 | 65.056 | 2013 | 64.815 | 2012 | 64.141 | 2011 | 63.901 | 2010 | 63.329 | 2009 | 63.155 | 2008 | 56.506 | 2007 | 62.371 | 2006 | 61.893 | 2005 | 61.599 | 2004 | 61.25 | 2003 | 60.98 | 2002 | 60.725 | 2001 | 60.416 | 2000 | 60.155 | 1999 | 59.881 | 1998 | 59.794 | 1997 | 59.243 | 1996 | 58.941 | 1995 | 58.259 | 1994 | 57.956 | 1993 | 57.631 | 1992 | 57.251 | 1991 | 57.014 | 1990 | 56.661 | 1989 | 56.565 | 1988 | 56.085 | 1987 | 56.076 | 1986 | 55.877 | 1985 | 55.642 | 1984 | 55.472 | 1983 | 55.202 | 1982 | 54.955 | 1981 | 54.646 | 1980 | 54.362 | 1979 | 53.944 | 1978 | 53.474 | 1977 | 53.305 | 1976 | 52.982 | 1975 | 52.516 | 1974 | 52.246 | 1973 | 51.87 | 1972 | 51.498 | 1971 | 51.215 | 1970 | 50.713 | 1969 | 50.342 | 1968 | 50.101 | 1967 | 49.297 | 1966 | 48.369 | 1965 | 47.46 | 1964 | 46.497 | 1963 | 45.636 | 1962 | 45.023 | 1961 | 44.385 | 1960 | 43.906 |
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