Year	Percent
1997-01-01	0.37364400000000003
1998-01-01	0.53174700000000010
1999-01-01	82.85060000000000000
2000-01-01	76.22210000000000000
2001-01-01	82.75820000000000000
2002-01-01	103.36800000000000000
2003-01-01	110.74400000000000000
2004-01-01	118.86399999999999000
2005-01-01	114.11000000000000000
2006-01-01	131.21000000000000000
2007-01-01	149.66200000000000000
2008-01-01	103.08700000000000000
2009-01-01	140.73100000000000000
2010-01-01	108.51000000000000000
2011-01-01	93.11220000000000000
2012-01-01	108.13200000000000000
2013-01-01	99.58520000000000000
2014-01-01	90.53340000000000000
2015-01-01	98.96690000000000000
2016-01-01	100.09100000000001000