Year	Percent
2001-01-01	33.275
2002-01-01	33.675
2003-01-01	33.800
2004-01-01	34.025
2005-01-01	32.900
2006-01-01	32.400
2007-01-01	32.200
2008-01-01	31.825
2009-01-01	32.700
2010-01-01	32.325
2011-01-01	32.225
2012-01-01	32.175
2013-01-01	31.850
2014-01-01	31.350
2015-01-01	31.625
2016-01-01	31.525
2017-01-01	30.825