Year	Percent
2000	27.93806
2001	27.81613
2002	25.60993
2003	20.09724
2004	6.98258
2005	4.03036
2006	2.0731
2007	3.51611
2008	4.62274
2009	11.09531
2010	9.41557
2011	12.9322
2012	10.45863
2013	10.31362
2014	15.40771
2015	18.88916
2016	26.05704
2017	16.23152