Year	Percent
2000-01-01	39.625
2001-01-01	37.775
2002-01-01	34.800
2003-01-01	38.900
2004-01-01	37.500
2005-01-01	36.225
2006-01-01	35.700
2007-01-01	37.900
2008-01-01	40.875
2009-01-01	39.050
2010-01-01	37.775
2011-01-01	40.025
2012-01-01	40.775
2013-01-01	39.775
2014-01-01	39.200
2015-01-01	41.750
2016-01-01	43.275
2017-01-01	46.100