Year	Percent
1996-01-01	68.7585
1997-01-01	66.1610
1998-01-01	69.6382
1999-01-01	71.9998
2000-01-01	75.4888
2001-01-01	76.7593
2002-01-01	75.3190
2003-01-01	73.9650
2004-01-01	69.7566
2005-01-01	64.2367
2006-01-01	62.1875
2007-01-01	65.0936
2008-01-01	65.3964
2009-01-01	62.6150
2010-01-01	61.5800
2011-01-01	59.7648
2012-01-01	54.5961
2013-01-01	52.8041
2014-01-01	48.6539
2015-01-01	55.7921
2016-01-01	53.5315