Year | Value | 2022 | 79.525859789059 | 2021 | 75.320511916547 | 2020 | 70.960885631755 | 2019 | 73.378333130403 | 2018 | 72.514934413385 | 2017 | 69.12944497344 | 2016 | 66.690915085488 | 2015 | 68.430914481671 | 2014 | 71.190815045614 | 2013 | 71.319668130796 | 2012 | 70.587053782413 | 2011 | 68.420764172406 | 2010 | 68.738367962204 | 2009 | 68.707151275709 | 2008 | 69.492082918176 | 2007 | 69.924142106953 | 2006 | 69.295473071912 | 2005 | 68.081888706431 | 2004 | 66.427844277841 | 2003 | 66.428730652141 | 2002 | 65.901574203997 | 2001 | 65.472250478266 | 2000 | 70.276718021192 | 1999 | 71.771062049411 | 1998 | 72.253283635073 | 1997 | 76.625683516267 | 1996 | 75.702957389294 | 1995 | 74.727536876809 | 1994 | 75.047939526281 | 1993 | 75.579750166132 | 1992 | 76.020136047979 | 1991 | 77.744528445493 | 1990 | 79.265338533931 | 1989 | 82.001122111274 | 1988 | 83.289875614914 | 1987 | 84.8275603726 | 1986 | 86.424375150505 | 1985 | 89.321412377028 | 1984 | 88.458246793233 | 1983 | 91.834620237778 | 1982 | 89.244342109972 | 1981 | 90.269934882205 | 1980 | 90.311787809727 | 1979 | 91.941176470588 | 1978 | 96.324227496641 | 1977 | 100.57411536793 | 1976 | 101.49744664719 | 1975 | 98.638742178257 | 1974 | 92.426608369769 | 1973 | 92.322632240375 | 1972 | 91.284425413579 | 1971 | 91.834313239357 | 1970 | 86.519554293205 | 1969 | 86.555921716323 | 1968 | 87.880863586777 | 1967 | 88.147875562601 | 1966 | 91.657467276455 | 1965 | 90.647232344265 | 1964 | 92.511184594437 | 1963 | 90.118272197463 |
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