Year	Percent
1993	10.14528
1994	16.84696
1995	29.996
1996	32.31267
1997	37.46775
1998	36.45204
1999	29.68053
2000	31.11995
2001	23.51749
2002	25.1783
2003	25.17099
2004	26.00504
2005	34.01785
2006	50.17626
2007	53.89016
2008	38.97581
2009	40.61897
2010	29.59371
2011	26.08403
2012	23.55643
2013	25.94287
2014	17.41401
2015	19.88356
2016	22.14502