Year	Percent
2001	2.57462
2002	1.98312
2003	1.22059
2004	1.65224
2005	1.59027
2006	1.25634
2007	1.24099
2008	0.81875
2009	0.85663
2010	0.99321
2011	1.17287
2012	0.92265
2013	1.09912
2014	1.11878
2015	0.98377
2016	0.86731
2017	0.94534