Year | Value | 2019 | 66.577765925162 | 2018 | 62.816808292468 | 2017 | 67.716576525292 | 2016 | 70.93451356347 | 2015 | 65.741022762544 | 2014 | 46.735976527982 | 2013 | 41.531945392077 | 2012 | 38.712663400537 | 2011 | 39.122776486967 | 2010 | 46.02227381557 | 2009 | 51.977951351316 | 2008 | 41.534535762422 | 2007 | 44.445774479291 | 2006 | 42.463903357709 | 2005 | 47.863367410949 | 2004 | 57.277911935467 | 2003 | 65.739598519681 | 2002 | 74.865401207938 | 2001 | 69.928971962617 | 2000 | 63.008737889251 | 1999 | 78.944785543693 | 1998 | 88.783911971163 | 1997 | 73.098938816297 | 1996 | 71.796884114072 | 1995 | 74.851797532629 | 1994 | 75.31842853598 | 1993 | 79.328656367546 | 1992 | 93.87968259024 | 1991 | 169.23445808788 | 1990 | 95.507989146819 | 1989 | 76.666336455324 | 1988 | 79.67955344834 | 1987 | 67.038643324238 | 1986 | 79.716156840556 | 1985 | 70.215539989519 | 1984 | 63.504017599684 | 1983 | 65.436824141656 | 1982 | 72.665522356149 | 1981 | 52.3504809084 | 1980 | 42.028161942174 | 1979 | 37.195534582752 | 1978 | 49.09363787726 | 1977 | 48.108011055513 | 1976 | 38.078495715811 | 1975 | 32.816173420815 | 1974 | 22.10595389735 | 1973 | 40.726887351163 | 1972 | 42.75956284153 | 1971 | 42.936752275058 | 1970 | 52.187469550814 | 1969 | 46.309403437816 | 1968 | 46.372239747634 | 1967 | 47.591743119266 | 1966 | 40.983606557377 | 1965 | 39.652870493992 |
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