Year Percent 2004-01-01 0.33 2005-01-01 1.07 2006-01-01 1.05 2007-01-01 1.01 2008-01-01 1.02 2009-01-01 2.28 2010-01-01 1.99 2011-01-01 1.93 2012-01-01 2.04 2013-01-01 2.06 2014-01-01 2.97 2015-01-01 2.77 2016-01-01 2.97