Year | Value | 2022 | 66.307 | 2021 | 66.219 | 2020 | 66.149 | 2019 | 66.095 | 2018 | 66.06 | 2017 | 66.041 | 2016 | 66.04 | 2015 | 66.056 | 2014 | 66.089 | 2013 | 66.14 | 2012 | 66.208 | 2011 | 66.276 | 2010 | 66.344 | 2009 | 66.412 | 2008 | 66.479 | 2007 | 66.547 | 2006 | 66.615 | 2005 | 66.682 | 2004 | 66.737 | 2003 | 66.664 | 2002 | 66.591 | 2001 | 66.517 | 2000 | 66.444 | 1999 | 66.371 | 1998 | 66.297 | 1997 | 66.223 | 1996 | 66.15 | 1995 | 66.076 | 1994 | 66.002 | 1993 | 65.928 | 1992 | 65.854 | 1991 | 65.78 | 1990 | 65.706 | 1989 | 65.632 | 1988 | 65.557 | 1987 | 65.483 | 1986 | 65.408 | 1985 | 65.334 | 1984 | 65.259 | 1983 | 65.184 | 1982 | 65.11 | 1981 | 65.035 | 1980 | 64.96 | 1979 | 62.803 | 1978 | 60.597 | 1977 | 58.346 | 1976 | 56.064 | 1975 | 53.749 | 1974 | 51.421 | 1973 | 49.087 | 1972 | 46.76 | 1971 | 45.716 | 1970 | 45.948 | 1969 | 46.18 | 1968 | 46.412 | 1967 | 46.644 | 1966 | 46.877 | 1965 | 47.109 | 1964 | 47.341 | 1963 | 47.372 | 1962 | 47.335 | 1961 | 47.297 | 1960 | 47.26 |
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