Year	Percent
2002	11.9374
2003	15.45751
2004	11.57334
2005	19.24476
2006	15.11909
2007	14.23376
2008	30.46005
2009	7.57021
2010	12.47832
2011	7.77896
2012	13.609
2013	10.72057
2014	8.20588
2015	4.18865
2016	8.05108
2017	4.72284