Year	Percent
1996-01-01	95.2188
1997-01-01	92.0911
1998-01-01	84.1961
1999-01-01	83.4403
2000-01-01	79.5419
2001-01-01	74.2794
2002-01-01	66.6503
2003-01-01	68.3982
2004-01-01	64.7322
2005-01-01	58.5950
2006-01-01	56.9858
2007-01-01	68.8444
2008-01-01	68.3955
2009-01-01	68.9097
2010-01-01	65.9495
2011-01-01	65.0170
2012-01-01	62.6308
2013-01-01	64.7196
2014-01-01	69.6621
2015-01-01	77.9900
2016-01-01	77.3643