Year	Percent
2002-01-01	89.25710000000000
2003-01-01	92.93920000000000
2004-01-01	96.79490000000000
2005-01-01	96.77530000000000
2006-01-01	98.78299999999999
2007-01-01	99.89030000000000
2008-01-01	99.91799999999999
2009-01-01	99.86860000000000
2010-01-01	99.83020000000000
2011-01-01	99.81330000000000
2012-01-01	99.80320000000000
2013-01-01	99.80500000000000
2014-01-01	99.80690000000000
2015-01-01	99.81460000000000
2016-01-01	99.83160000000000