Year | Value | 2022 | 60.913675058168 | 2021 | 60.986124523349 | 2020 | 63.835925742362 | 2019 | 60.962669263849 | 2018 | 61.437311228779 | 2017 | 60.060045669188 | 2016 | 64.154003631117 | 2015 | 66.093744650009 | 2014 | 72.352156451592 | 2013 | 76.209477080198 | 2012 | 79.281094635704 | 2011 | 80.849031035905 | 2010 | 77.666467100083 | 2009 | 80.874204067522 | 2008 | 79.699330262657 | 2007 | 80.270414912613 | 2006 | 83.43510147498 | 2005 | 82.757491165882 | 2004 | 82.362039480342 | 2003 | 80.0105359195 | 2002 | 79.743084793154 | 2001 | 83.466955873376 | 2000 | 81.216135971809 | 1999 | 81.243201243201 | 1998 | 80.738734714389 | 1997 | 81.406119278116 | 1996 | 83.046568790274 | 1995 | 79.529965572964 | 1994 | 79.124841697241 | 1993 | 79.399643518469 | 1992 | 79.280425622159 | 1991 | 79.31610060976 | 1990 | 80.181996252569 | 1989 | 81.222228101257 | 1988 | 81.175196387993 | 1987 | 81.721389790097 | 1986 | 84.542726244727 | 1985 | 87.73838167657 | 1984 | 86.294722763174 | 1983 | 84.944776869941 | 1982 | 84.54173330451 | 1981 | 81.232329974042 | 1980 | 80.865023607657 | 1979 | 79.688481881414 | 1978 | 83.778359655862 | 1977 | 88.618219902775 | 1976 | 84.202568398825 | 1975 | 89.99302542558 | 1974 | 101.79937570866 | 1973 | 97.548219693257 | 1972 | 98.08990507474 | 1971 | 96.712011226734 | 1970 | 97.284822802985 |
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