Year % 1993 80.37634 1997 72.17695 1998 61.56338 2000 59.36967 2003 47.86217 2005 50 2006 47.752 2007 45.47364 2008 49.65479 2009 49.36613 2010 50.2439 2011 49.95951 2012 52.88404 2013 52.36456 2014 52.11884 2015 47.20937 2016 46.81184 2018 56.1086 2019 54.84835 2020 54.91243 2021 54.56208