Year Percent 2007-01-01 0.6835110000000000 2008-01-01 0.7959490000000000 2009-01-01 0.8700370000000001 2010-01-01 4.1094500000000000 2011-01-01 5.0981200000000000 2012-01-01 5.8750200000000000 2013-01-01 5.9743500000000000 2014-01-01 5.2302800000000005 2015-01-01 5.7532000000000000 2016-01-01 5.1596300000000000