Year	Percent
1997-01-01	308.27000000000000
1998-01-01	305.15200000000000
1999-01-01	312.24400000000000
2000-01-01	338.53300000000000
2001-01-01	297.36300000000000
2002-01-01	175.73100000000000
2003-01-01	110.81500000000000
2004-01-01	112.92100000000000
2005-01-01	119.84299999999999
2006-01-01	111.31400000000000
2007-01-01	100.18100000000000
2008-01-01	109.33600000000000
2009-01-01	115.66799999999999
2010-01-01	116.81000000000000
2011-01-01	119.97600000000000
2012-01-01	117.56600000000000
2013-01-01	112.46300000000000
2014-01-01	104.03900000000000
2015-01-01	98.88930000000000