Year | Value | 2021 | 69.096 | 2020 | 68.948 | 2019 | 68.782 | 2018 | 68.521 | 2017 | 68.243 | 2016 | 67.938 | 2015 | 67.626 | 2014 | 67.387 | 2013 | 67.17 | 2012 | 66.966 | 2011 | 66.793 | 2010 | 66.625 | 2009 | 66.517 | 2008 | 66.451 | 2007 | 66.468 | 2006 | 66.527 | 2005 | 66.597 | 2004 | 66.621 | 2003 | 66.586 | 2002 | 66.476 | 2001 | 66.3 | 2000 | 66.065 | 1999 | 65.792 | 1998 | 65.489 | 1997 | 65.206 | 1996 | 64.914 | 1995 | 64.635 | 1994 | 64.327 | 1993 | 63.953 | 1992 | 63.536 | 1991 | 63.049 | 1990 | 62.509 | 1989 | 62.007 | 1988 | 61.497 | 1987 | 60.997 | 1986 | 60.553 | 1985 | 60.143 | 1984 | 59.807 | 1983 | 59.533 | 1982 | 59.264 | 1981 | 59.048 | 1980 | 58.841 | 1979 | 58.633 | 1978 | 58.455 | 1977 | 57.554 | 1976 | 58.186 | 1975 | 58.01 | 1974 | 57.776 | 1973 | 57.468 | 1972 | 56.936 | 1971 | 56.561 | 1970 | 55.966 | 1969 | 55.293 | 1968 | 54.614 | 1967 | 53.907 | 1966 | 53.157 | 1965 | 52.404 | 1964 | 51.695 | 1963 | 51.005 | 1962 | 50.35 | 1961 | 49.758 | 1960 | 49.233 |
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