Year	Percent
1997-01-01	0.5184550000000
1998-01-01	0.6355460000000
1999-01-01	1027.5200000000000
2000-01-01	990.7780000000000
2001-01-01	1093.9200000000000
2002-01-01	964.2719999999999
2003-01-01	944.2560000000001
2004-01-01	1020.8200000000000
2005-01-01	1045.9900000000000
2006-01-01	1221.0000000000000
2007-01-01	1331.0500000000000
2008-01-01	1238.4200000000000
2009-01-01	1224.9500000000000
2010-01-01	1208.3800000000000
2011-01-01	1041.1700000000000
2012-01-01	1212.7600000000000
2013-01-01	1034.7300000000000
2014-01-01	879.4839999999999
2015-01-01	1045.0900000000000
2016-01-01	1091.3700000000000