Year	Percent
1996-01-01	65.7556
1997-01-01	64.2718
1998-01-01	62.2624
1999-01-01	66.2682
2000-01-01	70.9827
2001-01-01	69.2471
2002-01-01	65.8615
2003-01-01	66.1151
2004-01-01	63.0106
2005-01-01	53.9666
2006-01-01	54.9001
2007-01-01	50.3514
2008-01-01	48.8591
2009-01-01	47.2846
2010-01-01	47.0123
2011-01-01	49.7322
2012-01-01	47.2601
2013-01-01	46.4078
2014-01-01	44.4261