Year	Percent
1999-01-01	36.050
2000-01-01	34.625
2001-01-01	35.300
2002-01-01	33.400
2003-01-01	31.975
2004-01-01	31.075
2005-01-01	29.975
2006-01-01	28.925
2007-01-01	28.275
2008-01-01	27.275
2009-01-01	26.925
2010-01-01	26.475
2011-01-01	26.100
2012-01-01	25.725
2013-01-01	25.700
2014-01-01	25.825
2015-01-01	25.700
2016-01-01	25.775
2017-01-01	26.100