Year	Percent
1999-01-01	3.725
2000-01-01	3.550
2001-01-01	3.600
2002-01-01	3.975
2003-01-01	4.325
2004-01-01	5.550
2005-01-01	5.675
2006-01-01	5.275
2007-01-01	4.925
2008-01-01	4.200
2009-01-01	5.400
2010-01-01	4.900
2011-01-01	4.625
2012-01-01	4.925
2013-01-01	5.425
2014-01-01	5.700
2015-01-01	5.825
2016-01-01	6.100
2017-01-01	5.575