Quarter	Percent
1999-04-01	68.9
2000-04-01	74.3
2001-04-01	80.3
2002-04-01	72.4
2003-01-01	65.8
2003-04-01	84.3
2003-07-01	82.4
2003-10-01	69.3
2004-01-01	63.2
2004-04-01	82.8
2004-07-01	77.1
2004-10-01	64.1
2005-01-01	63.2
2005-04-01	82.3
2005-07-01	81
2005-10-01	70.5
2006-01-01	65.9
2006-04-01	85.8
2006-07-01	82.2
2006-10-01	74
2007-01-01	73.7
2007-04-01	86.7
2007-07-01	84.1
2007-10-01	76.2
2008-01-01	71
2008-04-01	85.5
2008-07-01	82.7
2008-10-01	68.2
2009-01-01	64
2009-04-01	82
2009-07-01	76.7
2009-10-01	60.6
2010-01-01	66
2010-04-01	81.6
2010-07-01	73.7
2010-10-01	64.1
2011-01-01	64.1
2011-04-01	81.6
2011-07-01	75.3
2011-10-01	65.6
2012-01-01	65.1
2012-04-01	84.6
2012-07-01	77.4
2012-10-01	67
2013-01-01	65.7
2013-04-01	82.7
2013-07-01	81.3
2013-10-01	69.4
2014-01-01	71.6
2014-04-01	84.6
2014-07-01	80.6
2014-10-01	73.5
2015-01-01	72.6
2015-04-01	86.0
2015-07-01	83.4
2015-10-01	71.8
2016-01-01	76.9
2016-04-01	88.1
2016-07-01	88.0
2016-10-01	77.3
2017-01-01	77.2
2017-04-01	92.4
2017-07-01	83.5
2017-10-01	75.4
2018-01-01	73.9
2018-04-01	85.7