Year | Value | 2021 | 61.141 | 2020 | 65.647 | 2019 | 65.464 | 2018 | 65.422 | 2017 | 66.753 | 2016 | 65.464 | 2015 | 63.818 | 2014 | 62.608 | 2013 | 61.996 | 2012 | 60.8 | 2011 | 60.53 | 2010 | 60.013 | 2009 | 58.279 | 2008 | 57.121 | 2007 | 55.732 | 2006 | 53.918 | 2005 | 52.61 | 2004 | 51.617 | 2003 | 50.947 | 2002 | 50.632 | 2001 | 50.676 | 2000 | 51.011 | 1999 | 51.694 | 1998 | 52.523 | 1997 | 53.448 | 1996 | 54.357 | 1995 | 55.059 | 1994 | 56.154 | 1993 | 57.719 | 1992 | 58.348 | 1991 | 59.473 | 1990 | 60.533 | 1989 | 61.427 | 1988 | 61.755 | 1987 | 62.522 | 1986 | 62.678 | 1985 | 62.626 | 1984 | 62.364 | 1983 | 62.004 | 1982 | 61.57 | 1981 | 61.125 | 1980 | 60.646 | 1979 | 60.176 | 1978 | 59.691 | 1977 | 59.169 | 1976 | 58.583 | 1975 | 57.998 | 1974 | 57.424 | 1973 | 56.861 | 1972 | 56.3 | 1971 | 55.745 | 1970 | 55.197 | 1969 | 54.684 | 1968 | 54.188 | 1967 | 53.721 | 1966 | 53.264 | 1965 | 52.809 | 1964 | 52.349 | 1963 | 51.881 | 1962 | 51.389 | 1961 | 50.891 | 1960 | 50.372 |
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