Year	Percent
2002	10.4826
2003	10.0178
2004	10.6848
2005	9.3192
2006	8.0149
2007	7.3532
2008	5.3621
2009	6.1988
2010	9.2333
2011	12.0309
2012	14.2483
2013	15.4208
2014	13.943
2015	13.2563
2016	10.4039
2017	9.2493