Year	Percent
1998-01-01	77.0452
1999-01-01	74.9608
2000-01-01	75.9104
2001-01-01	73.4826
2002-01-01	70.5813
2003-01-01	66.9166
2004-01-01	64.9557
2005-01-01	65.1029
2006-01-01	64.6159
2007-01-01	64.2475
2008-01-01	63.4019
2009-01-01	65.3337
2010-01-01	100.0000
2011-01-01	56.1095
2012-01-01	57.5162
2013-01-01	56.1996
2014-01-01	55.6027
2015-01-01	54.8520
2016-01-01	53.2153