Year	Percent
2000	51.11021
2001	61.98593
2002	59.87328
2003	46.98714
2004	58.08761
2005	61.07601
2006	77.43316
2007	85.74318
2008	92.82052
2009	65.09416
2010	62.73592
2011	64.31003
2012	68.09358
2013	61.42855
2014	59.98395
2015	60.57091
2016	62.9233
2017	65.18438