Year % 2009 5.86910175632252 2010 7.8074135254831 2011 3.5272700795754 2012 10.6707564994314 2013 6.79342240618839 2014 6.87068790595697 2015 6.63027167224262 2016 9.62105068496718 2017 7.91683451676683 2018 9.3155186631086 2019 9.44593710175681