Year Number 1996 89 1998 94.0298538208008 2000 92.0398025512695 2002 82.0895538330078 2003 84.5771179199219 2004 83.6538467407227 2005 83.6538467407227 2006 86.538459777832 2007 86.0576934814453 2008 85.0961532592773 2009 81.5165863037109 2010 78.1990509033203 2011 78.8732376098633 2012 84.0375595092773 2013 86.3849792480469 2014 86.6995086669922 2015 81.7733993530273 2016 81.2807846069336 2017 79.8029556274414 2018 77.6699066162109 2019 78.260871887207 2020 76.8115921020508 2021 73.4299545288086 2022 71.4975814819336