Year Percent 2004-01-01 0.004565000000000000 2005-01-01 0.006405000000000000 2006-01-01 0.000901000000000000 2007-01-01 0.014006999999999999 2008-01-01 0.226181000000000000 2009-01-01 1.622740000000000000 2010-01-01 1.702080000000000000 2011-01-01 1.929960000000000000 2012-01-01 1.878090000000000000 2013-01-01 1.791840000000000000 2014-01-01 1.818650000000000000 2015-01-01 1.664380000000000000 2016-01-01 1.040100000000000000 2017-01-01 0.963563000000000000