Year	Percent
1996-01-01	66.3768
1997-01-01	73.1759
1998-01-01	77.0335
1999-01-01	86.9626
2000-01-01	84.7508
2001-01-01	83.7517
2002-01-01	80.1276
2003-01-01	78.8891
2004-01-01	75.7779
2005-01-01	69.9398
2006-01-01	73.0823
2007-01-01	72.7197
2008-01-01	72.5158
2009-01-01	71.3433
2010-01-01	67.9800
2011-01-01	75.9220
2012-01-01	83.8469
2013-01-01	81.6310
2014-01-01	80.3838
2015-01-01	91.3121
2016-01-01	87.9081