Year	Percent
2003-01-01	3.550
2004-01-01	3.050
2005-01-01	2.600
2006-01-01	2.625
2007-01-01	2.250
2008-01-01	3.250
2009-01-01	8.575
2010-01-01	8.300
2011-01-01	7.800
2012-01-01	6.300
2013-01-01	5.650
2014-01-01	5.000
2015-01-01	3.900
2016-01-01	2.900
2017-01-01	2.750