Year	Percent
2001	0.10011
2003	0.0775
2004	0.07672
2005	0.05713
2006	0.05834
2007	0.03951
2008	0.04252
2009	0.04071
2010	0.02784
2011	0.02625
2012	0.02671
2013	0.02388
2014	0.01817
2016	0.01418
2017	0.01445