Year Percent 2003-01-01 1.51 2004-01-01 1.63 2005-01-01 1.79 2006-01-01 1.72 2007-01-01 1.96 2008-01-01 1.76 2009-01-01 1.94 2010-01-01 2.10 2011-01-01 2.12 2012-01-01 2.08 2013-01-01 2.07 2014-01-01 2.03