Year	Percent
1994	53.8023
1995	49.45259
1996	53.78866
1997	56.18667
1998	56.13163
1999	52.04043
2000	55.03785
2001	58.45837
2002	54.29972
2003	59.59864
2004	62.5543
2005	59.45007
2006	60.92142
2007	63.54832
2008	69.42937
2009	70.22942
2010	66.75559
2011	84.0252
2012	75.36503
2013	70.41848
2014	60.70011
2015	63.41018
2016	74.26592
2017	93.63086