Year	Percent
2000-01-01	3.200
2001-01-01	2.375
2002-01-01	2.800
2003-01-01	3.450
2004-01-01	4.225
2005-01-01	4.475
2006-01-01	3.800
2007-01-01	3.075
2008-01-01	2.450
2009-01-01	2.850
2010-01-01	3.700
2011-01-01	4.550
2012-01-01	5.125
2013-01-01	6.200
2014-01-01	6.650
2015-01-01	6.275
2016-01-01	5.400
2017-01-01	4.200