Year	Percent
1997-01-01	113.18400000000000
1998-01-01	123.45299999999999
1999-01-01	123.45299999999999
2000-01-01	123.45299999999999
2001-01-01	34.51920000000000
2002-01-01	40.45350000000000
2003-01-01	38.71060000000000
2004-01-01	45.93430000000000
2005-01-01	54.55230000000000
2006-01-01	71.06730000000000
2007-01-01	84.68670000000000
2008-01-01	92.06930000000000
2009-01-01	107.26100000000001
2010-01-01	108.21100000000000
2011-01-01	109.61000000000000
2012-01-01	108.98100000000001
2013-01-01	108.10100000000000
2014-01-01	114.75900000000000
2015-01-01	112.93100000000000
2016-01-01	104.68799999999999