Year	Percent
1997-01-01	2861.01000000000000
1998-01-01	2861.06000000000000
1999-01-01	1167.74000000000000
2000-01-01	655.47200000000000
2001-01-01	234.15700000000000
2002-01-01	136.99900000000000
2003-01-01	144.05100000000002
2004-01-01	126.78100000000000
2005-01-01	128.46000000000000
2006-01-01	126.53600000000000
2007-01-01	126.19100000000000
2008-01-01	141.31500000000000
2009-01-01	147.30800000000000
2010-01-01	137.26000000000000
2011-01-01	124.61100000000000
2012-01-01	115.33900000000000
2013-01-01	111.57500000000000
2014-01-01	106.04000000000000
2015-01-01	101.06600000000000
2016-01-01	96.72060000000000