Year	Percent
2001	0.0824
2003	0.07256
2004	0.06395
2005	0.0419
2006	0.04418
2007	0.02999
2008	0.03597
2009	0.03303
2010	0.02401
2011	0.02249
2012	0.02313
2013	0.02053
2014	0.01585
2016	0.0125
2017	0.01397