Year	Percent
1994	1.96659
1995	6.95933
1996	6.67566
1997	6.61157
1998	12.05891
1999	17.66315
2000	20.14287
2001	12.2746
2002	15.9774
2003	14.10627
2004	11.11128
2005	13.57587
2006	18.99493
2007	18.48939
2008	21.03574
2009	40.50072
2010	38.37393
2011	30.11256
2012	31.30644
2013	42.29528
2014	29.40935
2015	54.80724
2016	29.26097