Year Percent 2008-01-01 0.10900000000000000 2009-01-01 0.15600000000000000 2010-01-01 0.11500000000000000 2011-01-01 0.10800000000000001 2012-01-01 0.10800000000000001 2013-01-01 0.14421300000000000 2014-01-01 0.14513099999999998 2015-01-01 0.08101699999999999 2016-01-01 0.13715400000000000