Year Percent 2005 1.17542 2006 0.98053 2007 0.81088 2008 0.58976 2009 0.53684 2010 1.37018 2011 0.35866 2012 0.15685 2013 0.0696 2014 0.00832 2015 0.22997 2016 0.36866 2017 0.40479 2018 0.41043 2019 5.06969