Year	Percent
1996-01-01	60.4429
1997-01-01	57.9532
1998-01-01	70.0667
1999-01-01	67.5053
2000-01-01	67.8892
2001-01-01	73.4173
2002-01-01	71.6837
2003-01-01	71.5949
2004-01-01	69.3475
2005-01-01	74.5572
2006-01-01	76.8767
2007-01-01	73.5410
2008-01-01	76.6683
2009-01-01	74.5243
2010-01-01	67.1049
2011-01-01	68.5705
2012-01-01	70.4600
2013-01-01	71.9280
2014-01-01	70.6854
2015-01-01	93.0741
2016-01-01	77.9136