Year | Value | 2021 | 70.975 | 2020 | 72.141 | 2019 | 71.822 | 2018 | 71.199 | 2017 | 70.237 | 2016 | 69.865 | 2015 | 69.498 | 2014 | 69.047 | 2013 | 68.585 | 2012 | 68.111 | 2011 | 67.439 | 2010 | 67.182 | 2009 | 66.766 | 2008 | 66.382 | 2007 | 65.97 | 2006 | 65.513 | 2005 | 64.879 | 2004 | 64.796 | 2003 | 64.208 | 2002 | 63.518 | 2001 | 63.279 | 2000 | 62.882 | 1999 | 62.529 | 1998 | 61.765 | 1997 | 60.815 | 1996 | 60.305 | 1995 | 60.612 | 1994 | 60.405 | 1993 | 60.038 | 1992 | 59.641 | 1991 | 59.237 | 1990 | 58.765 | 1989 | 58.344 | 1988 | 57.87 | 1987 | 57.388 | 1986 | 56.911 | 1985 | 56.841 | 1984 | 56.687 | 1983 | 56.232 | 1982 | 55.777 | 1981 | 55.693 | 1980 | 55.64 | 1979 | 55.573 | 1978 | 55.547 | 1977 | 55.501 | 1976 | 55.432 | 1975 | 55.65 | 1974 | 55.215 | 1973 | 54.631 | 1972 | 54.016 | 1971 | 53.345 | 1970 | 52.678 | 1969 | 52.004 | 1968 | 51.457 | 1967 | 50.887 | 1966 | 50.186 | 1965 | 49.619 | 1964 | 48.921 | 1963 | 48.065 | 1962 | 47.109 | 1961 | 46.068 | 1960 | 44.984 |
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