Year | Value | 2022 | 82.039790965621 | 2021 | 83.798015198307 | 2020 | 81.924425399299 | 2019 | 73.673489704182 | 2018 | 78.154043118164 | 2017 | 79.196148039336 | 2016 | 76.003335943085 | 2015 | 76.129325189113 | 2014 | 77.800962204323 | 2013 | 77.584531768554 | 2012 | 76.65478900041 | 2011 | 76.728448083253 | 2010 | 74.199465914404 | 2009 | 73.264168560082 | 2008 | 72.439673190196 | 2007 | 70.512905030353 | 2006 | 71.770636111043 | 2005 | 69.181187857099 | 2004 | 68.50802127817 | 2003 | 67.628400613748 | 2002 | 66.279630138405 | 2001 | 70.187777340965 | 2000 | 66.545161438104 | 1999 | 67.195306531735 | 1998 | 70.057747299223 | 1997 | 69.391190646141 | 1996 | 83.959822665558 | 1995 | 81.951297754447 | 1994 | 80.200675053697 | 1993 | 79.554657179819 | 1992 | 78.340302348022 | 1991 | 80.088134329318 | 1990 | 75.684775742261 | 1989 | 76.087197909863 | 1987 | 75.685338087153 | 1986 | 75.664307381193 | 1985 | 75.30917720124 | 1984 | 78.369506638577 | 1983 | 71.116112650046 | 1982 | 72.299309383514 | 1981 | 76.144416403785 | 1980 | 74.208043136374 | 1979 | 78.504993989736 | 1978 | 73.51033157136 | 1977 | 70.981767180926 |
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