Year	Percent
2000	49.05743
2001	51.32014
2002	51.51739
2003	50.85713
2004	50.98932
2005	53.51629
2006	52.63332
2007	51.30346
2008	51.07301
2009	50.82391
2010	51.98687
2011	55.79783
2012	58.80715
2013	59.87376
2014	60.35
2015	62.27797
2016	61.0327
2017	60.11172