Year Percent 2006-01-01 0.052410000000000005 2007-01-01 0.549989000000000100 2008-01-01 0.464549000000000000 2009-01-01 1.065570000000000100 2010-01-01 1.038590000000000000 2011-01-01 1.149020000000000200 2012-01-01 1.514520000000000000 2013-01-01 1.588330000000000000 2014-01-01 1.531270000000000100 2015-01-01 1.442920000000000000 2016-01-01 1.913579999999999800