Year Percent 2000-01-01 64.70000000000000 2001-01-01 63.00000000000000 2002-01-01 41.70000000000000 2003-01-01 53.90000000000000 2004-01-01 53.60000000000000 2005-01-01 55.50000000000000 2006-01-01 57.40000000000000 2007-01-01 59.80000000000000 2008-01-01 61.40000000000000 2009-01-01 71.00000000000000 2010-01-01 90.65940000000000 2011-01-01 120.37500000000000 2012-01-01 110.17299999999999 2013-01-01 101.86500000000000 2014-01-01 99.35390000000000 2015-01-01 82.18240000000000 2016-01-01 81.65570000000000