Year Percent 2007-01-01 116.84200000000001 2008-01-01 91.52180000000000 2009-01-01 61.86150000000000 2010-01-01 48.55980000000000 2011-01-01 55.71700000000000 2012-01-01 52.06320000000000 2013-01-01 60.22980000000000