Year	Percent
2002	5.6517
2003	4.3632
2004	5.1876
2005	4.441
2006	4.7309
2007	4.3877
2008	4.2099
2009	5.5822
2010	5.4976
2011	6.3903
2012	9.6109
2013	7.3575
2014	10.8066
2015	10.6318
2016	7.4539
2017	7.9238