Year	Percent
1998-01-01	92.10000000000000
1999-01-01	99.50000000000000
2000-01-01	99.50000000000000
2001-01-01	63.00000000000000
2002-01-01	69.10000000000000
2003-01-01	67.10000000000000
2004-01-01	68.70000000000000
2005-01-01	80.20000000000000
2006-01-01	100.30000000000000
2007-01-01	131.60000000000000
2008-01-01	151.00000000000000
2009-01-01	139.30000000000000
2010-01-01	135.29800000000000
2011-01-01	143.25500000000000
2012-01-01	135.51800000000000
2013-01-01	126.31200000000001
2014-01-01	114.37400000000000
2015-01-01	116.47600000000000
2016-01-01	111.12100000000001