Year	Percent
2000-01-01	41.850
2001-01-01	42.675
2002-01-01	44.275
2003-01-01	43.975
2004-01-01	44.100
2005-01-01	43.400
2006-01-01	40.725
2007-01-01	25.525
2008-01-01	29.975
2009-01-01	37.250
2010-01-01	44.000
2011-01-01	46.425
2012-01-01	48.100
2013-01-01	48.375
2014-01-01	49.825
2015-01-01	49.850
2016-01-01	47.325
2017-01-01	52.125