Year	Percent
2005-01-01	33.700
2006-01-01	33.100
2007-01-01	33.100
2008-01-01	31.500
2009-01-01	31.100
2010-01-01	32.850
2011-01-01	32.100
2012-01-01	31.825
2013-01-01	31.450
2014-01-01	30.600
2015-01-01	30.225
2016-01-01	29.425
2017-01-01	29.725