Year	Percent
1999-01-01	23.100
2000-01-01	24.025
2001-01-01	26.475
2002-01-01	25.225
2003-01-01	24.225
2004-01-01	29.925
2005-01-01	32.050
2006-01-01	33.425
2007-01-01	34.550
2008-01-01	34.150
2009-01-01	36.875
2010-01-01	36.475
2011-01-01	33.300
2012-01-01	35.050
2013-01-01	36.000
2014-01-01	38.425
2015-01-01	39.650
2016-01-01	41.200
2017-01-01	45.650