Year	Percent
2002	8.17291
2003	7.53784
2004	8.11727
2005	7.89324
2006	8.17882
2007	9.69698
2008	10.5552
2009	9.64778
2010	10.00304
2011	10.15469
2012	11.08249
2013	12.07885
2014	14.62663
2015	14.16824
2016	15.26111