Year	Percent
2003	67.7447
2004	68.01101
2005	66.55038
2006	66.62741
2007	68.61676
2008	66.77891
2009	71.02221
2010	68.7761
2011	67.67924
2012	65.85321
2013	67.47706
2014	67.23573
2015	67.36378
2016	64.99097