Year Percent 2002-01-01 0.55 2003-01-01 0.45 2004-01-01 0.75 2005-01-01 0.97 2006-01-01 1.33 2007-01-01 1.74 2008-01-01 1.68 2009-01-01 1.75 2010-01-01 1.58 2011-01-01 1.37 2012-01-01 1.43 2013-01-01 1.45 2014-01-01 1.49 2015-01-01 2.01 2016-01-01 1.89