Year	Percent
2004	6.1506
2005	4.0729
2006	5.5833
2007	4.2447
2008	3.0069
2009	3.6625
2010	3.8657
2011	2.9902
2012	2.7972
2013	2.5387
2014	2.6044
2015	2.8805
2016	3.184
2017	2.047