Year	Percent
1994	5.6709
1995	6.20109
1996	4.20283
1997	13.20314
1998	43.71323
1999	63.40367
2000	51.71435
2001	36.39645
2002	36.58954
2003	44.81794
2004	35.71482
2005	38.02692
2006	44.7199
2007	45.37415
2008	39.42621
2009	44.18051
2010	39.97234
2011	40.84476
2012	39.61323
2013	43.32212
2014	36.04953
2015	16.83027
2016	18.25831