Year	Percent
1999-01-01	31.050
2000-01-01	32.375
2001-01-01	35.850
2002-01-01	35.425
2003-01-01	33.200
2004-01-01	40.900
2005-01-01	43.150
2006-01-01	44.550
2007-01-01	45.225
2008-01-01	44.700
2009-01-01	46.375
2010-01-01	45.600
2011-01-01	39.475
2012-01-01	40.750
2013-01-01	41.775
2014-01-01	41.750
2015-01-01	42.600
2016-01-01	43.575
2017-01-01	48.000