Year	Percent
2003	19.35591
2004	16.29309
2005	24.15826
2006	23.13912
2007	30.49815
2008	40.29841
2009	32.21238
2010	52.35332
2011	64.00871
2012	37.86723
2013	30.37858
2014	22.67687
2015	25.29002
2016	25.10801