Year | Value | 2022 | 60.134 | 2021 | 60.075 | 2020 | 60.043 | 2019 | 60.037 | 2018 | 60.058 | 2017 | 60.105 | 2016 | 60.178 | 2015 | 60.278 | 2014 | 60.403 | 2013 | 60.529 | 2012 | 60.654 | 2011 | 60.78 | 2010 | 60.892 | 2009 | 61.004 | 2008 | 61.116 | 2007 | 61.229 | 2006 | 61.341 | 2005 | 61.452 | 2004 | 61.564 | 2003 | 61.676 | 2002 | 61.787 | 2001 | 61.761 | 2000 | 61.716 | 1999 | 61.672 | 1998 | 61.627 | 1997 | 61.583 | 1996 | 61.538 | 1995 | 61.493 | 1994 | 61.449 | 1993 | 61.404 | 1992 | 61.359 | 1991 | 61.315 | 1990 | 61.27 | 1989 | 61.225 | 1988 | 61.043 | 1987 | 60.676 | 1986 | 60.31 | 1985 | 59.942 | 1984 | 59.573 | 1983 | 59.202 | 1982 | 58.831 | 1981 | 58.459 | 1980 | 58.086 | 1979 | 57.712 | 1978 | 57.22 | 1977 | 56.575 | 1976 | 55.929 | 1975 | 55.28 | 1974 | 54.629 | 1973 | 53.977 | 1972 | 53.324 | 1971 | 52.668 | 1970 | 52.125 | 1969 | 51.726 | 1968 | 51.326 | 1967 | 50.926 | 1966 | 50.526 | 1965 | 50.126 | 1964 | 49.727 | 1963 | 49.326 | 1962 | 48.926 | 1961 | 48.527 | 1960 | 47.892 |
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