Year	Percent
2008-01-01	4.800
2010-01-01	3.625
2011-01-01	4.025
2012-01-01	5.375
2013-01-01	6.325
2014-01-01	6.650
2015-01-01	7.200
2016-01-01	5.150
2017-01-01	5.300