Year | Value | 2021 | 80.388555593646 | 2020 | 80.353102502571 | 2019 | 80.71820363387 | 2018 | 81.081019312079 | 2017 | 81.264426922637 | 2016 | 81.506684950291 | 2015 | 82.662552851103 | 2014 | 82.70540509656 | 2013 | 81.971774654325 | 2012 | 81.344989144098 | 2011 | 82.9962290024 | 2010 | 82.464861158725 | 2009 | 84.641755227974 | 2008 | 83.841846646098 | 2007 | 83.133356187864 | 2006 | 83.961832933379 | 2005 | 84.744600617072 | 2004 | 84.727459718889 | 2003 | 85.287395726203 | 2002 | 85.264541195292 | 2001 | 85.487372871672 | 2000 | 85.464518340761 | 1999 | 85.44166380985 | 1998 | 85.41880927894 | 1997 | 85.390241115301 | 1996 | 85.36738658439 | 1995 | 85.350245686207 | 1994 | 85.327391155296 | 1993 | 85.304536624386 | 1992 | 85.275968460747 | 1991 | 85.253113929837 | 1990 | 85.230259398926 | 1989 | 84.687464289795 | 1988 | 84.784596046166 | 1987 | 84.893155067992 | 1986 | 85.104559478917 | 1985 | 85.321677522569 | 1984 | 85.487372871672 | 1983 | 85.658781853502 | 1982 | 85.824477202605 | 1981 | 86.007313449891 | 1980 | 86.167295166267 | 1979 | 86.395840475374 | 1978 | 86.624385784482 | 1977 | 86.852931093589 | 1976 | 87.075762769969 | 1975 | 87.310021711804 | 1974 | 87.538567020912 | 1973 | 87.761398697292 | 1972 | 87.989944006399 | 1971 | 88.224202948235 | 1970 | 88.452748257342 | 1969 | 89.406924922866 | 1968 | 89.829733744715 | 1967 | 90.515369672037 | 1966 | 90.932464861159 | 1965 | 91.263855559365 | 1964 | 91.898068792138 | 1963 | 92.223745857616 | 1962 | 92.840818192207 | 1961 | 93.440749628614 |
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