Year Percent 2003-01-01 24.400 2004-01-01 24.550 2005-01-01 24.825 2006-01-01 25.125 2007-01-01 25.325 2008-01-01 25.275 2009-01-01 25.050 2010-01-01 25.175 2011-01-01 25.375 2012-01-01 24.725 2013-01-01 24.525 2014-01-01 24.900 2015-01-01 24.700 2016-01-01 24.600 2017-01-01 24.375