Year	Percent
1998-01-01	129.37820430
1999-01-01	99.74725342
2000-01-01	78.16236877
2001-01-01	75.33570099
2002-01-01	88.27883911
2003-01-01	85.89998627
2004-01-01	80.88063812
2005-01-01	85.61622620
2006-01-01	77.54373932
2007-01-01	82.22660828
2008-01-01	84.38201141
2009-01-01	83.75206757
2010-01-01	85.99388123
2011-01-01	81.13335419
2012-01-01	81.70415497
2013-01-01	76.95329285