Year	Percent
2006	2.9198
2007	5.5471
2008	7.0009
2009	7.3732
2010	3.0956
2011	3.1118
2012	6.0761
2013	5.2571
2014	3.5343
2015	3.2439
2016	2.3337
2017	2.7428