Year	Percent
2003-01-01	3.425
2004-01-01	3.025
2005-01-01	2.625
2006-01-01	2.850
2007-01-01	2.250
2008-01-01	3.000
2009-01-01	7.400
2010-01-01	7.750
2011-01-01	7.125
2012-01-01	6.100
2013-01-01	5.500
2014-01-01	5.050
2015-01-01	4.150
2016-01-01	3.125
2017-01-01	2.900