Year	Percent
2003-01-01	33.350
2004-01-01	34.175
2005-01-01	35.725
2006-01-01	35.825
2007-01-01	36.050
2008-01-01	35.875
2009-01-01	36.500
2010-01-01	37.350
2011-01-01	38.900
2012-01-01	41.625
2013-01-01	43.000
2014-01-01	45.175
2015-01-01	46.875
2016-01-01	48.150
2017-01-01	49.925