Year | Value | 2021 | 61.427 | 2020 | 62.675 | 2019 | 62.943 | 2018 | 62.676 | 2017 | 62.481 | 2016 | 62.163 | 2015 | 61.892 | 2014 | 61.816 | 2013 | 61.389 | 2012 | 61.115 | 2011 | 61.046 | 2010 | 60.649 | 2009 | 60.365 | 2008 | 59.614 | 2007 | 58.865 | 2006 | 58.222 | 2005 | 57.344 | 2004 | 56.361 | 2003 | 55.601 | 2002 | 54.99 | 2001 | 54.508 | 2000 | 54.411 | 1999 | 54.495 | 1998 | 54.526 | 1997 | 54.816 | 1996 | 55.161 | 1995 | 55.617 | 1994 | 56.273 | 1993 | 56.617 | 1992 | 57.259 | 1991 | 58.005 | 1990 | 58.614 | 1989 | 59.04 | 1988 | 59.539 | 1987 | 60.044 | 1986 | 60.216 | 1985 | 60.58 | 1984 | 60.804 | 1983 | 61.012 | 1982 | 60.953 | 1981 | 61.165 | 1980 | 58.501 | 1979 | 57.722 | 1978 | 56.944 | 1977 | 56.486 | 1976 | 55.895 | 1975 | 55.826 | 1974 | 55.634 | 1973 | 55.677 | 1972 | 55.012 | 1971 | 54.258 | 1970 | 53.575 | 1969 | 53.169 | 1968 | 52.781 | 1967 | 52.455 | 1966 | 52.097 | 1965 | 51.7 | 1964 | 51.328 | 1963 | 50.808 | 1962 | 50.224 | 1961 | 49.533 | 1960 | 48.68 |
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