Year Percent 2000-01-01 0.13 2001-01-01 0.28 2002-01-01 0.58 2003-01-01 0.94 2004-01-01 1.04 2005-01-01 1.41 2006-01-01 1.26 2007-01-01 1.40 2008-01-01 0.73 2009-01-01 0.88 2010-01-01 1.09 2011-01-01 1.05 2012-01-01 1.43 2013-01-01 1.72 2014-01-01 1.79 2015-01-01 1.72 2016-01-01 1.61