Year Percent 2000-01-01 0.021 2001-01-01 0.025 2002-01-01 0.059 2003-01-01 0.049 2004-01-01 0.095 2005-01-01 0.110 2006-01-01 0.201 2007-01-01 0.229 2008-01-01 0.160 2009-01-01 0.690 2010-01-01 1.039 2011-01-01 1.306 2012-01-01 1.545 2013-01-01 2.118