Year % 1994 0.8431229 1999 0.3288924 2001 0 2002 0.223055 2003 0 2004 0.1525299 2005 0 2006 0 2007 0 2008 0.6553357 2009 0 2010 0.3514361 2012 0.3971771 2013 0.5009508 2014 0.5046682 2015 0.4459824 2016 0.4517236 2017 0.4935222 2018 0.6956818 2019 0.4820079 2020 0.5093801 2021 0.508409