Year	Percent
1999-01-01	43.750
2000-01-01	43.625
2001-01-01	44.875
2002-01-01	43.750
2003-01-01	43.150
2004-01-01	41.800
2005-01-01	40.500
2006-01-01	40.475
2007-01-01	39.550
2008-01-01	39.225
2009-01-01	39.075
2010-01-01	38.175
2011-01-01	38.900
2012-01-01	38.650
2013-01-01	37.725
2014-01-01	37.025
2015-01-01	37.075
2016-01-01	37.150
2017-01-01	36.825