Year Percent 2002-01-01 0.012859000000000000 2003-01-01 0.014575000000000000 2004-01-01 0.013519000000000000 2005-01-01 0.012890000000000000 2006-01-01 0.012598000000000000 2007-01-01 0.012043000000000000 2008-01-01 0.012043000000000000 2009-01-01 0.010348000000000000 2010-01-01 0.011740000000000000 2011-01-01 0.006711000000000000 2012-01-01 0.008879999999999999 2013-01-01 0.008992000000000000