Year	Percent
2002	12.69198
2003	8.42891
2004	8.31239
2005	5.75465
2006	4.14654
2007	3.71107
2008	7.12735
2009	38.03654
2010	30.8747
2011	19.96132
2012	12.50893
2013	11.75785
2014	13.6991
2015	13.32135
2016	28.10915