Year	Percent
2003-01-01	31.600
2004-01-01	31.900
2005-01-01	31.700
2006-01-01	34.400
2007-01-01	33.725
2008-01-01	32.625
2009-01-01	30.700
2010-01-01	31.250
2011-01-01	32.075
2012-01-01	30.975
2013-01-01	30.375
2014-01-01	30.025
2015-01-01	30.400
2016-01-01	31.500
2017-01-01	32.900