Year	Percent
2006-01-01	0.17333900000000002
2007-01-01	0.19411700000000000
2008-01-01	0.18244500000000000
2009-01-01	0.20202300000000000
2010-01-01	0.25949000000000000
2011-01-01	0.28880100000000003
2012-01-01	0.28682100000000000
2013-01-01	0.32692400000000000
2014-01-01	0.35192399999999996
2015-01-01	0.38057100000000000
2016-01-01	0.56875700000000000