Year	Percent
1996-01-01	46.9259
1997-01-01	47.8497
1998-01-01	55.7509
1999-01-01	62.1862
2000-01-01	75.9610
2001-01-01	66.7596
2002-01-01	56.6673
2003-01-01	64.7631
2004-01-01	82.5921
2005-01-01	31.7945
2006-01-01	30.8398
2007-01-01	44.9299
2008-01-01	51.7973
2009-01-01	53.2354
2010-01-01	61.5619
2011-01-01	62.5545
2012-01-01	61.8073
2013-01-01	62.7711
2014-01-01	64.3872
2015-01-01	62.9111
2016-01-01	59.4027