Year	Percent
2007-01-01	0.01
2008-01-01	0.01
2009-01-01	0.02
2010-01-01	0.02
2011-01-01	0.04
2012-01-01	0.04
2013-01-01	0.54
2014-01-01	0.61
2015-01-01	0.64
2016-01-01	0.68