Year	Percent
2002	3.90437
2003	2.4167
2004	1.8896
2005	1.49432
2006	1.31474
2007	1.18695
2008	1.22133
2009	1.37762
2010	1.28127
2011	1.13737
2012	1.14687
2013	1.08851
2014	1.02787
2015	0.9717
2016	0.96251
2017	0.89938