Year Percent 1995-01-01 515.68200000000000 1996-01-01 550.49900000000000 1997-01-01 518.69100000000000 1998-01-01 677.92000000000000 1999-01-01 511.53800000000000 2000-01-01 414.31699999999995 2001-01-01 446.49199999999996 2002-01-01 273.64400000000000 2003-01-01 273.64700000000000 2004-01-01 338.07900000000000 2005-01-01 246.93099999999998 2006-01-01 306.01700000000000 2007-01-01 299.97800000000000 2008-01-01 189.01100000000000 2009-01-01 147.63000000000000 2010-01-01 200.42500000000000 2011-01-01 119.79500000000000 2012-01-01 130.75000000000000 2013-01-01 125.22700000000000 2014-01-01 98.04770000000000 2015-01-01 100.39200000000001