Year	Percent
2002	11.2
2004	9.8
2005	10.53
2006	9.96
2007	9.32
2008	9.12
2009	10.84
2010	11.93
2011	10.75
2012	10.91
2013	8.6
2014	8.8
2015	9.29
2016	10.49
2017	10.19