Year	Percent
2003-01-01	30.300
2004-01-01	30.400
2005-01-01	31.700
2006-01-01	33.200
2007-01-01	32.000
2008-01-01	34.075
2009-01-01	38.200
2010-01-01	39.650
2011-01-01	39.300
2012-01-01	41.000
2013-01-01	40.450
2014-01-01	42.550
2015-01-01	38.450
2016-01-01	39.550
2017-01-01	39.750