Year | Value | 2021 | 66.574 | 2020 | 67.345 | 2019 | 67.755 | 2018 | 67.231 | 2017 | 67.174 | 2016 | 67.031 | 2015 | 65.835 | 2014 | 66.357 | 2013 | 66.191 | 2012 | 65.736 | 2011 | 65.559 | 2010 | 65.093 | 2009 | 64.985 | 2008 | 64.664 | 2007 | 64.503 | 2006 | 64.015 | 2005 | 63.525 | 2004 | 62.886 | 2003 | 62.376 | 2002 | 61.362 | 2001 | 61.779 | 2000 | 61.199 | 1999 | 60.764 | 1998 | 60.186 | 1997 | 59.706 | 1996 | 59.063 | 1995 | 58.564 | 1994 | 57.873 | 1993 | 57.053 | 1992 | 56.421 | 1991 | 55.412 | 1990 | 54.751 | 1989 | 54.08 | 1988 | 53.099 | 1987 | 52.53 | 1986 | 51.676 | 1985 | 51.026 | 1984 | 50.365 | 1983 | 49.551 | 1982 | 48.953 | 1981 | 48.3 | 1980 | 47.829 | 1979 | 47.093 | 1978 | 46.462 | 1977 | 45.89 | 1976 | 45.34 | 1975 | 44.891 | 1974 | 44.275 | 1973 | 43.831 | 1972 | 43.442 | 1971 | 43.024 | 1970 | 42.522 | 1969 | 42.195 | 1968 | 41.603 | 1967 | 41.23 | 1966 | 40.764 | 1965 | 40.296 | 1964 | 39.833 | 1963 | 39.294 | 1962 | 38.996 | 1961 | 38.605 | 1960 | 38.334 |
|