Year | Value | 2022 | 50.020615101333 | 2021 | 60.062059269678 | 2020 | 69.581158865545 | 2019 | 68.002497680665 | 2018 | 65.834242255383 | 2017 | 68.091389282848 | 2016 | 69.51414217106 | 2015 | 66.362669530823 | 2014 | 62.472072657899 | 2013 | 60.922553703725 | 2012 | 60.052288203945 | 2011 | 60.830184677264 | 2010 | 62.950327998032 | 2009 | 63.54844342283 | 2008 | 56.566004420062 | 2007 | 58.952051840246 | 2006 | 58.655895105829 | 2005 | 61.16306307795 | 2004 | 64.942120871998 | 2003 | 67.547834332351 | 2002 | 66.249037013832 | 2001 | 62.637836788987 | 2000 | 61.268729309298 | 1999 | 68.154537479579 | 1998 | 69.861465708445 | 1997 | 66.882699283299 | 1996 | 68.435873902028 | 1995 | 69.856136919112 | 1994 | 71.127633347525 | 1993 | 71.707772144293 | 1992 | 71.883413090508 | 1991 | 70.09747027859 | 1990 | 69.165351978567 | 1989 | 69.130272805785 | 1988 | 70.203016485866 | 1987 | 70.719071815825 | 1986 | 70.493132982307 | 1985 | 65.280351065608 | 1984 | 63.729500914142 | 1983 | 65.835514625592 | 1982 | 66.181413466889 | 1981 | 65.027820926926 | 1980 | 65.687337210435 | 1979 | 69.068670628505 | 1978 | 69.700312029752 | 1977 | 70.994442634228 | 1976 | 69.470066643211 | 1975 | 68.336737484652 | 1974 | 66.183443166932 | 1973 | 67.183363093406 | 1972 | 68.091673807733 | 1971 | 68.396551891697 | 1970 | 67.716595651699 |
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