Year	Percent
2002	16.50855
2003	15.41524
2004	14.52428
2005	15.4405
2006	15.70469
2007	15.49412
2008	15.36683
2009	14.73832
2010	13.69974
2011	14.24046
2012	16.0616
2013	15.35354
2015	16.17454
2016	15.39581