Year	Percent
2005-01-01	18.600
2006-01-01	17.300
2007-01-01	15.525
2008-01-01	15.625
2009-01-01	19.925
2010-01-01	21.075
2011-01-01	21.700
2012-01-01	23.200
2013-01-01	23.650
2014-01-01	22.200
2015-01-01	20.350
2016-01-01	18.700
2017-01-01	16.850