Year Percent 2007-01-01 0.005046 2008-01-01 0.010000 2009-01-01 0.020000 2010-01-01 0.030000 2011-01-01 0.010000 2012-01-01 0.020000 2013-01-01 0.030000 2014-01-01 0.040000 2015-01-01 0.060000 2016-01-01 0.090000