Year Percent 2000-01-01 14.925 2001-01-01 13.200 2002-01-01 11.450 2003-01-01 10.625 2004-01-01 10.400 2005-01-01 8.275 2006-01-01 6.075 2007-01-01 4.750 2008-01-01 5.550 2009-01-01 13.875 2010-01-01 17.125 2011-01-01 12.625 2012-01-01 10.250 2013-01-01 8.850 2014-01-01 7.550 2015-01-01 6.275 2016-01-01 6.950 2017-01-01 5.925