Year | Value | 2021 | 62.341 | 2020 | 65.252 | 2019 | 66.175 | 2018 | 65.674 | 2017 | 65.402 | 2016 | 64.747 | 2015 | 63.95 | 2014 | 63.38 | 2013 | 62.533 | 2012 | 61.846 | 2011 | 60.651 | 2010 | 58.899 | 2009 | 57.447 | 2008 | 56.022 | 2007 | 54.992 | 2006 | 54.278 | 2005 | 53.98 | 2004 | 54.043 | 2003 | 54.331 | 2002 | 55.666 | 2001 | 57.261 | 2000 | 58.47 | 1999 | 59.241 | 1998 | 60.001 | 1997 | 60.805 | 1996 | 61.459 | 1995 | 62.262 | 1994 | 62.612 | 1993 | 63.045 | 1992 | 63.341 | 1991 | 63.265 | 1990 | 63.375 | 1989 | 63.31 | 1988 | 63.345 | 1987 | 63.041 | 1986 | 62.912 | 1985 | 62.38 | 1984 | 61.907 | 1983 | 61.465 | 1982 | 60.933 | 1981 | 60.364 | 1980 | 59.813 | 1979 | 59.395 | 1978 | 58.979 | 1977 | 58.492 | 1976 | 58.006 | 1975 | 57.512 | 1974 | 57.117 | 1973 | 56.722 | 1972 | 56.272 | 1971 | 55.955 | 1970 | 55.579 | 1969 | 55.194 | 1968 | 54.876 | 1967 | 54.626 | 1966 | 54.391 | 1965 | 54.192 | 1964 | 53.906 | 1963 | 53.633 | 1962 | 53.376 | 1961 | 53.085 | 1960 | 52.669 |
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