Year | Value | 2019 | 168.18270065937 | 2018 | 154.54408193358 | 2017 | 144.6062641997 | 2016 | 138.28321370609 | 2015 | 129.32267176061 | 2014 | 118.15234588258 | 2013 | 112.57611413863 | 2012 | 106.5627374798 | 2011 | 105.02146014621 | 2010 | 100 | 2009 | 92.834665896028 | 2008 | 91.487653726359 | 2007 | 72.151409816912 | 2006 | 53.435752730713 | 2005 | 44.531097465481 | 2004 | 40.71652199873 | 2003 | 38.95042641206 | 2002 | 28.516367934375 | 2001 | 18.154675577363 | 2000 | 14.991312868888 | 1999 | 15.007696097573 | 1998 | 12.675307302949 | 1997 | 8.3672270914893 | 1996 | 6.4513536064718 | 1995 | 5.5483393675889 | 1994 | 4.4317681324929 | 1993 | 3.5711615501133 | 1992 | 2.7088811513616 | 1991 | 2.2219750775622 | 1990 | 1.6798524513148 | 1989 | 1.4281208091148 | 1988 | 1.1227494916668 | 1987 | 0.96753048924437 | 1986 | 0.77551337707948 | 1985 | 0.70936208601461 | 1984 | 0.66414965613087 | 1983 | 0.63345066347782 | 1982 | 0.59957422021017 | 1981 | 0.56937058854336 | 1980 | 0.56756321338239 | 1979 | 0.56413242464463 | 1978 | 0.53385083052324 | 1977 | 0.56819664811807 | 1976 | 0.57484581633988 | 1975 | 0.46970513264641 | 1974 | 0.35676789146474 | 1973 | 0.28493184072503 | 1972 | 0.2275813424335 | 1971 | 0.21142306712072 | 1970 | 0.20709902161448 | 1969 | 0.21574711262468 | 1968 | 0.22553311034932 | 1967 | 0.22029873947335 | 1966 | 0.21847808873616 | 1965 | 0.17409972696163 | 1964 | 0.14792787258177 | 1963 | 0.1486106166068 | 1962 | 0.1527070807706 | 1961 | 0.15521047553965 | 1960 | 0.1554380568798 |
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