Year	Percent
1996-01-01	100.0000
1997-01-01	93.0440
1998-01-01	83.9418
1999-01-01	77.1982
2000-01-01	79.5566
2001-01-01	81.6841
2002-01-01	74.7289
2003-01-01	76.6808
2004-01-01	77.1893
2005-01-01	82.1575
2006-01-01	86.1502
2007-01-01	85.4529
2008-01-01	80.9575
2009-01-01	75.3277
2010-01-01	72.9317
2011-01-01	65.8850
2012-01-01	60.5025
2013-01-01	58.1378
2014-01-01	57.8716
2015-01-01	59.1179
2016-01-01	56.7906