Year	Percent
2000-01-01	26.200
2001-01-01	23.375
2002-01-01	21.450
2003-01-01	24.100
2004-01-01	22.525
2005-01-01	26.800
2006-01-01	25.800
2007-01-01	29.800
2008-01-01	32.900
2009-01-01	26.675
2010-01-01	24.150
2011-01-01	28.975
2012-01-01	30.350
2013-01-01	30.650
2014-01-01	33.250
2015-01-01	33.075
2016-01-01	36.075
2017-01-01	38.200