Year	Percent
1996-01-01	77.43610000000000
1997-01-01	99.90930000000000
1998-01-01	118.38300000000000
1999-01-01	105.00800000000000
2000-01-01	76.13080000000000
2001-01-01	76.13080000000000
2002-01-01	76.13080000000000
2003-01-01	76.13080000000000
2004-01-01	102.34299999999999
2005-01-01	97.18550000000000
2006-01-01	104.53299999999999
2007-01-01	112.52100000000000
2008-01-01	92.01430000000000
2009-01-01	78.73510000000000
2010-01-01	70.79410000000000
2011-01-01	63.31160000000000
2012-01-01	54.43820000000000
2013-01-01	54.43820000000000
2014-01-01	65.43580000000000
2015-01-01	66.68370000000000
2016-01-01	61.12960000000000
2017-01-01	58.91780000000000