Year | Value | 2022 | 56.411589187283 | 2021 | 56.968620348418 | 2020 | 57.520826142405 | 2019 | 58.068968064187 | 2018 | 58.617316888679 | 2017 | 59.171355495003 | 2016 | 59.726462563565 | 2015 | 60.278281773563 | 2014 | 60.826766267842 | 2013 | 61.374847093476 | 2012 | 61.929784722705 | 2011 | 62.478224893333 | 2010 | 63.029431793773 | 2009 | 63.572520393561 | 2008 | 64.107765913659 | 2007 | 64.624285314219 | 2006 | 65.020907001442 | 2005 | 65.483956252367 | 2004 | 65.988705297067 | 2003 | 66.471537280799 | 2002 | 66.933538764771 | 2001 | 67.381031790545 | 2000 | 67.842610011801 | 1999 | 68.223246314378 | 1998 | 68.592800468436 | 1997 | 68.965944317129 | 1996 | 69.340057392701 | 1995 | 69.692821321633 | 1994 | 70.022399286941 | 1993 | 70.388731336766 | 1992 | 70.817530022252 | 1991 | 71.225492073607 | 1990 | 71.627840795014 | 1989 | 72.143636808057 | 1988 | 72.689738124136 | 1987 | 73.269493460303 | 1986 | 73.879042217237 | 1985 | 74.482738221559 | 1984 | 75.077569160454 | 1983 | 75.653778100525 | 1982 | 76.188317878539 | 1981 | 76.714376323235 | 1980 | 77.243512391531 | 1979 | 77.704209084843 | 1978 | 78.173375228561 | 1977 | 78.700902545609 | 1976 | 79.228801807023 | 1975 | 79.770487541769 | 1974 | 80.30208419569 | 1973 | 80.826095946171 | 1972 | 81.364254274002 | 1971 | 81.896843494212 | 1970 | 82.404513301538 | 1969 | 82.85853504761 | 1968 | 83.316554196935 | 1967 | 83.760419372753 | 1966 | 84.179337140958 | 1965 | 84.590660021649 | 1964 | 85.017768494046 | 1963 | 85.431036384593 | 1962 | 85.826806881112 | 1961 | 86.200359933627 | 1960 | 86.557435052461 |
|