Year	Percent
1999-01-01	3.600
2000-01-01	3.100
2001-01-01	3.500
2002-01-01	3.100
2003-01-01	4.500
2004-01-01	4.800
2005-01-01	5.100
2006-01-01	4.700
2007-01-01	4.500
2008-01-01	4.000
2009-01-01	4.500
2010-01-01	5.175
2011-01-01	4.800
2012-01-01	4.750
2013-01-01	4.950
2014-01-01	5.000
2015-01-01	4.950
2016-01-01	5.025
2017-01-01	5.075