Year	Percent
1994	33.77417
1995	43.32928
1996	39.78348
1997	36.16623
1998	39.96249
1999	25.69218
2000	22.3293
2001	29.07581
2002	28.12695
2003	28.46737
2004	26.2042
2005	29.6605
2006	35.75319
2007	35.83673
2008	28.07049
2009	29.00929
2010	23.75061
2011	26.10193
2012	29.27387
2013	29.66536
2014	31.03624
2015	36.0003
2016	41.62544