Year	Percent
2002	2.91
2006	2.9
2007	2.79
2008	2.5444
2009	2.4559
2010	2.6462
2011	6.0316
2012	5.4034
2013	5.9421
2014	6.4167
2015	5.1804
2016	4.8013
2017	4.57