Year	Percent
2003	14.06213
2004	14.67982
2005	15.04449
2006	15.40886
2007	14.25721
2008	16.2493
2009	17.66235
2010	22.041
2011	19.99205
2012	18.84527
2013	18.49728
2014	18.06083