Year	Percent
1996-01-01	71.9746
1997-01-01	66.3408
1998-01-01	62.6419
1999-01-01	66.5822
2000-01-01	61.5291
2001-01-01	60.4503
2002-01-01	68.0432
2003-01-01	67.4927
2004-01-01	82.0797
2005-01-01	61.3661
2006-01-01	60.8925
2007-01-01	63.3465
2008-01-01	65.9642
2009-01-01	63.4930
2010-01-01	63.9811
2011-01-01	73.5502
2012-01-01	67.8857
2013-01-01	81.7580
2014-01-01	65.6446