Year Percent 2001-01-01 1.250000 2002-01-01 1.275000 2003-01-01 1.375000 2004-01-01 1.650000 2005-01-01 1.825000 2006-01-01 1.275000 2007-01-01 1.025000 2009-01-01 1.525000 2010-01-01 1.775000 2011-01-01 1.350000 2012-01-01 1.525000 2013-01-01 1.324825 2014-01-01 1.475000 2015-01-01 1.750000 2016-01-01 2.550000 2017-01-01 2.525000