Year % 1985 17.203192386183368 1986 21.259750899613493 1987 26.59057562671161 1988 50.0287992788116 1989 47.435951207988275 1990 65.01432383411324 1991 61.42936531519538 1992 60.19636848493073 1993 68.06158292106836 1994 64.28351286012247 1995 65.65585197909998 1996 64.68631219600705 1997 67.55154552249893 1998 67.70429175634553 1999 69.88313628408609 2000 75.60681468980906 2001 77.75946801109191 2002 79.72143504728109 2003 79.76288527897897 2004 81.4588463918939 2005 79.10426137469237 2006 79.28060791331693 2007 78.79814256694824 2008 80.48201180954815 2009 80.43496081310724 2010 86.19668027165137 2011 86.90243595813095 2012 86.92716177016732 2013 85.61747729923086 2014 85.65481824264339 2015 85.60315422955131 2016 84.2717089128636 2017 86.75874523889317 2018 86.61076307465933 2019 86.73286709823842 2020 86.3407654059157 2021 87.30669245311617 2022 87.35279845672868