Year	Percent
1994	46.38224
1995	64.35938
1996	71.76095
1997	68.6188
1998	59.30107
1999	55.92034
2000	61.52032
2001	57.44718
2002	62.80091
2003	70.0056
2004	57.9766
2005	56.63947
2006	49.75682
2007	48.01168
2008	47.01836
2009	46.61574
2010	51.77281
2011	54.0282
2012	53.12393
2013	53.56039
2014	50.99869
2015	44.76851
2016	48.02888
2017	55.69843