Year	Percent
1999-01-01	10.375
2000-01-01	13.450
2001-01-01	12.525
2002-01-01	15.575
2003-01-01	14.675
2004-01-01	15.625
2005-01-01	13.275
2006-01-01	9.900
2007-01-01	7.825
2008-01-01	5.425
2009-01-01	6.375
2010-01-01	9.575
2011-01-01	10.700
2012-01-01	10.975
2013-01-01	10.550
2014-01-01	9.725
2015-01-01	8.200
2016-01-01	8.350
2017-01-01	5.675