Year | Value | 2022 | 78.708 | 2021 | 78.5 | 2020 | 78.297 | 2019 | 78.099 | 2018 | 77.907 | 2017 | 77.72 | 2016 | 77.539 | 2015 | 77.357 | 2014 | 77.173 | 2013 | 76.989 | 2012 | 76.804 | 2011 | 76.617 | 2010 | 76.43 | 2009 | 76.241 | 2008 | 76.052 | 2007 | 75.803 | 2006 | 75.421 | 2005 | 75.034 | 2004 | 74.644 | 2003 | 74.249 | 2002 | 73.85 | 2001 | 73.448 | 2000 | 73.042 | 1999 | 72.631 | 1998 | 72.216 | 1997 | 71.798 | 1996 | 71.377 | 1995 | 70.951 | 1994 | 70.521 | 1993 | 70.089 | 1992 | 69.697 | 1991 | 69.3 | 1990 | 68.901 | 1989 | 68.499 | 1988 | 68.095 | 1987 | 67.687 | 1986 | 67.277 | 1985 | 66.864 | 1984 | 66.449 | 1983 | 66.031 | 1982 | 65.61 | 1981 | 65.182 | 1980 | 64.574 | 1979 | 63.96 | 1978 | 63.341 | 1977 | 62.719 | 1976 | 62.093 | 1975 | 61.461 | 1974 | 60.827 | 1973 | 60.188 | 1972 | 59.547 | 1971 | 58.496 | 1970 | 57.406 | 1969 | 56.309 | 1968 | 55.207 | 1967 | 54.096 | 1966 | 52.983 | 1965 | 51.868 | 1964 | 50.752 | 1963 | 49.632 | 1962 | 48.514 | 1961 | 47.398 | 1960 | 46.811 |
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