Year	Percent
1996-01-01	71.8795
1997-01-01	73.0703
1998-01-01	71.5054
1999-01-01	42.4609
2000-01-01	46.5454
2001-01-01	50.2164
2002-01-01	50.4228
2003-01-01	48.1823
2004-01-01	82.7230
2005-01-01	69.7447
2006-01-01	70.3820
2007-01-01	76.7563
2008-01-01	79.0800
2009-01-01	75.0557
2010-01-01	75.6614
2011-01-01	75.7661
2012-01-01	74.4707
2013-01-01	73.3877
2014-01-01	73.4064
2015-01-01	71.0253
2016-01-01	70.3001