Year	Percent
1996-01-01	86.0237
1997-01-01	92.7082
1998-01-01	90.5766
1999-01-01	90.4283
2000-01-01	88.9884
2001-01-01	90.5818
2002-01-01	91.6633
2003-01-01	94.2508
2004-01-01	93.2911
2005-01-01	93.2701
2006-01-01	94.1628
2007-01-01	94.6249
2008-01-01	93.6996
2009-01-01	93.1844
2010-01-01	92.7741
2011-01-01	93.5609
2012-01-01	90.5617
2013-01-01	90.4150
2014-01-01	90.9388
2015-01-01	88.0943
2016-01-01	81.6228