Year	Percent
2008-01-01	0.36
2009-01-01	0.48
2010-01-01	0.57
2011-01-01	0.58
2012-01-01	0.64
2013-01-01	0.57
2014-01-01	0.69
2015-01-01	0.75
2016-01-01	0.87