Year	Percent
2005	62.44642
2006	65.30169
2007	65.05236
2008	64.65816
2009	62.6926
2010	61.67925
2011	63.82174
2012	61.63176
2013	60.82835
2014	64.40093
2015	63.13711
2016	67.15679
2017	64.05049