Year | Value | 2015 | 93.019128139543 | 2014 | 93.98125951658 | 2013 | 93.918626627661 | 2012 | 93.827047124828 | 2011 | 88.936914147185 | 2010 | 80.144078309245 | 2009 | 80.361082892644 | 2008 | 82.345866927385 | 2007 | 82.645415645456 | 2006 | 80.715024758973 | 2005 | 80.924207427428 | 2004 | 82.07032778527 | 2003 | 83.675310105767 | 2002 | 81.232268851439 | 2001 | 79.720955908501 | 2000 | 79.807864150252 | 1999 | 79.674112614524 | 1998 | 78.428287832798 | 1997 | 79.366652584373 | 1996 | 80.000058758889 | 1995 | 80.195125184564 | 1994 | 81.327273395498 | 1993 | 80.936732822793 | 1992 | 82.399165295436 | 1991 | 82.263998616981 | 1990 | 82.998738600042 | 1989 | 82.905509705283 | 1988 | 82.466390724932 | 1987 | 80.720375560337 | 1986 | 81.230582442403 | 1985 | 81.52426946803 | 1984 | 83.628315572664 | 1983 | 83.615105579249 | 1982 | 84.608487086866 | 1981 | 86.787772259972 | 1980 | 87.434380885189 | 1979 | 88.833369529285 | 1978 | 89.139712613248 | 1977 | 90.318952323812 | 1976 | 89.832226253554 | 1975 | 90.191569315021 | 1974 | 90.489616905226 | 1973 | 90.789628735845 | 1972 | 88.592144269339 | 1971 | 86.623496680998 | 1970 | 84.663199149659 | 1969 | 81.309836961914 | 1968 | 77.126833973324 | 1967 | 74.087680842085 | 1966 | 66.818657058389 | 1965 | 64.245616077995 | 1964 | 61.073900293384 | 1963 | 57.103919111458 | 1962 | 49.968204079721 | 1961 | 45.394394456696 | 1960 | 41.882660859967 |
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