Year | Value | 2022 | 80.255572412328 | 2021 | 79.847143363515 | 2020 | 80.163836265868 | 2019 | 81.045801700561 | 2018 | 81.098459898597 | 2017 | 81.481713203671 | 2016 | 80.769344597132 | 2015 | 81.908519767654 | 2014 | 83.242258193926 | 2013 | 83.292651703962 | 2012 | 83.891709117637 | 2011 | 83.646025153401 | 2010 | 82.019348468288 | 2009 | 82.041794073252 | 2008 | 84.177851316171 | 2007 | 82.005552559883 | 2006 | 82.100842882045 | 2005 | 83.329473440966 | 2004 | 81.911199658255 | 2003 | 83.019230659824 | 2002 | 82.078554546416 | 2001 | 79.720124592816 | 2000 | 79.977588863694 | 1999 | 81.343084191718 | 1998 | 81.450559688268 | 1997 | 84.340643394719 | 1996 | 86.282698007759 | 1995 | 83.974105918261 | 1994 | 85.457234750544 | 1993 | 86.249088211553 | 1992 | 85.099210898276 | 1991 | 86.225594421935 | 1990 | 79.581786596064 | 1989 | 77.294653550615 | 1988 | 77.32059101717 | 1987 | 77.012681112305 | 1986 | 73.944487635418 | 1985 | 75.863758956911 | 1984 | 76.890072995119 | 1983 | 76.56386779467 | 1982 | 72.394880377297 | 1981 | 75.881174831653 | 1980 | 83.766406225909 | 1979 | 84.956510710786 | 1978 | 84.3889011421 | 1977 | 81.196095834826 | 1976 | 82.339569347443 | 1975 | 86.844673999052 | 1974 | 88.238989143511 | 1973 | 82.080019659923 | 1972 | 84.350884880352 | 1971 | 85.974502703146 | 1970 | 86.207374855004 | 1969 | 85.327036844605 | 1968 | 86.661986983088 | 1967 | 86.980727098541 | 1966 | 86.934525087889 | 1965 | 91.121288475434 | 1964 | 88.154748832687 | 1963 | 86.246391369909 | 1962 | 83.873083051141 | 1961 | 85.3172909152 | 1960 | 87.390310268113 |
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