Year	Percent
1996-01-01	98.49500000000000
1997-01-01	97.80040000000000
1998-01-01	97.62350000000000
1999-01-01	94.99220000000000
2000-01-01	94.86110000000000
2001-01-01	95.12740000000000
2002-01-01	95.62560000000000
2003-01-01	96.80410000000000
2004-01-01	95.89390000000000
2005-01-01	92.13440000000000
2006-01-01	87.87650000000000
2007-01-01	87.94690000000000
2008-01-01	86.07540000000000
2009-01-01	93.64260000000000
2010-01-01	94.04630000000000
2011-01-01	94.19870000000000
2012-01-01	94.44510000000000
2013-01-01	94.83200000000001
2014-01-01	95.03010000000000
2015-01-01	96.20410000000000
2016-01-01	96.76200000000000