Year | Value | 2022 | 76.829655641404 | 2021 | 77.877370305327 | 2020 | 82.319225848459 | 2019 | 78.867757331595 | 2018 | 79.157432860912 | 2017 | 80.388910423797 | 2016 | 80.795021846864 | 2015 | 81.205767953163 | 2014 | 82.080702444052 | 2013 | 83.623772159317 | 2012 | 84.926573611885 | 2011 | 85.589459865022 | 2010 | 84.268465723874 | 2009 | 84.976943048562 | 2008 | 83.554857557115 | 2007 | 80.071795670647 | 2006 | 80.38977859645 | 2005 | 80.218211286963 | 2004 | 78.429121004003 | 2003 | 80.734344125137 | 2002 | 80.318506913155 | 2001 | 79.958683556639 | 2000 | 80.412080612204 | 1999 | 79.227777982063 | 1998 | 79.222155816726 | 1997 | 81.687256824638 | 1996 | 82.814803881591 | 1995 | 83.394979103752 | 1994 | 83.736432830202 | 1993 | 85.466094047673 | 1992 | 88.066033122798 | 1991 | 86.287053633952 | 1990 | 84.627338707299 | 1989 | 82.365599327719 | 1988 | 79.1698201519 | 1987 | 84.162505807102 | 1986 | 83.975103106177 | 1985 | 87.299164790024 | 1984 | 90.398878790754 | 1983 | 87.622357477821 | 1982 | 88.956926488376 | 1981 | 84.684354044939 | 1980 | 89.09356571961 | 1979 | 84.385952207754 | 1978 | 86.947628632984 | 1977 | 85.414022515315 | 1976 | 84.56699719094 | 1975 | 78.846228414648 | 1974 | 86.006394729467 | 1973 | 82.316320513477 | 1972 | 83.658641642347 | 1971 | 91.838062226223 | 1970 | 90.833187202962 | 1969 | 91.531897602601 | 1968 | 94.634417570197 | 1967 | 93.428681870893 | 1966 | 95.070637259884 | 1965 | 96.554442067335 | 1964 | 91.868203185277 | 1963 | 91.252156808265 | 1962 | 90.595837883752 | 1961 | 87.127293341295 | 1960 | 83.432517890772 |
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