Year	Percent
1996-01-01	88.7556
1997-01-01	89.3332
1998-01-01	89.3677
1999-01-01	89.0858
2000-01-01	88.6012
2001-01-01	89.5839
2002-01-01	87.7248
2003-01-01	86.6989
2004-01-01	83.2189
2005-01-01	79.6901
2006-01-01	74.0550
2007-01-01	64.1192
2008-01-01	63.8437
2009-01-01	56.5979
2010-01-01	50.4255
2011-01-01	50.0025
2012-01-01	49.7405
2013-01-01	48.9841
2014-01-01	47.7388
2015-01-01	61.1835
2016-01-01	51.0059