Year	Percent
1996-01-01	71.2164
1997-01-01	64.3340
1998-01-01	69.9429
1999-01-01	69.2605
2000-01-01	70.0511
2001-01-01	69.7221
2002-01-01	69.3567
2003-01-01	74.7093
2004-01-01	78.3927
2005-01-01	77.8732
2006-01-01	74.1841
2007-01-01	72.5215
2008-01-01	72.7243
2009-01-01	75.8280
2010-01-01	75.6561
2011-01-01	76.2790
2012-01-01	75.8616
2013-01-01	74.8367
2014-01-01	74.3468
2015-01-01	84.5089
2016-01-01	75.4664