Year Percent 2003-01-01 19.70000000000000 2004-01-01 14.20000000000000 2005-01-01 24.80000000000000 2006-01-01 34.30000000000000 2007-01-01 39.20000000000000 2008-01-01 116.40000000000000 2009-01-01 155.00000000000000 2010-01-01 124.83500000000000 2011-01-01 159.96700000000000 2012-01-01 170.66800000000000 2013-01-01 282.71600000000000 2014-01-01 232.05900000000003 2015-01-01 181.17600000000000 2016-01-01 175.96200000000002