Year	Percent
2008-01-01	30.7501
2009-01-01	32.4160
2010-01-01	39.6177
2011-01-01	37.9207
2012-01-01	38.3845
2013-01-01	37.6812
2014-01-01	38.8664
2015-01-01	39.4775
2016-01-01	40.2739