Year Percent 2000-01-01 0.4175370000000000 2001-01-01 0.4194830000000000 2002-01-01 0.4575350000000000 2003-01-01 0.4914000000000000 2004-01-01 0.3952570000000000 2005-01-01 0.6359300000000000 2006-01-01 0.6569689999999999 2007-01-01 1.3739000000000000 2008-01-01 0.7278840000000000 2009-01-01 0.9886710000000000 2010-01-01 0.5645730000000000 2011-01-01 1.3679500000000000 2012-01-01 0.5528740000000000 2013-01-01 0.4297380000000000 2014-01-01 0.3208560000000000 2015-01-01 0.3960180000000000 2016-01-01 0.3572590000000000