Year	Percent
1993	11.56708
1994	15.07452
1995	21.54013
1996	14.7121
1997	22.7296
1998	22.46909
1999	31.98715
2000	31.09646
2001	53.32723
2002	46.86919
2003	49.4756
2004	35.04387
2005	44.96032
2006	57.30547
2007	54.24535
2008	48.64991
2009	43.61191
2010	44.13002
2011	43.50399
2012	44.69461
2013	40.78493
2014	40.98284
2015	36.51249
2016	37.27507