Year	Percent
2000	1.25396
2001	0.76678
2003	0.94219
2004	0.64972
2005	0.4664
2006	0.46798
2007	0.33742
2008	0.2897
2009	0.40437
2010	0.35865
2011	0.28527
2012	0.24184
2013	0.23222
2014	0.22168
2015	0.32832
2016	0.59271
2017	0.49292