Year	Percent
1993-01-01	68.36600000000000
1994-01-01	64.23360000000000
1995-01-01	62.81760000000000
1996-01-01	66.60880000000000
1997-01-01	68.30430000000000
1998-01-01	63.31840000000000
1999-01-01	61.95220000000000
2000-01-01	76.11430000000000
2001-01-01	78.97330000000000
2002-01-01	82.53760000000000
2003-01-01	86.08710000000000
2004-01-01	90.52600000000001
2005-01-01	94.14950000000000
2006-01-01	96.75160000000000
2007-01-01	97.44840000000000
2008-01-01	97.81060000000000
2009-01-01	98.12820000000000
2010-01-01	98.30650000000000
2011-01-01	98.65030000000000
2012-01-01	98.85780000000000
2013-01-01	98.98380000000000
2014-01-01	99.14490000000000
2015-01-01	99.11850000000000
2016-01-01	99.20410000000000