Year	Percent
2005	47.36743
2006	50.55685
2007	49.89088
2008	50.51237
2009	45.43854
2010	44.60092
2011	48.49152
2012	45.76684
2013	43.15104
2014	48.29208
2015	45.19936
2016	48.42184
2017	44.43834