Quarter	Percent
1999-07-01	70.9340283226376
1999-10-01	72.2664559441427
2000-01-01	70.5479812527557
2000-04-01	72.7686777331386
2000-07-01	72.7263765197546
2000-10-01	73.0122460079579
2001-01-01	70.6923566799013
2001-04-01	73.3741367731171
2001-07-01	72.9579220394429
2001-10-01	73.4559642178179
2002-01-01	72.1532401660618
2002-04-01	74.1159934652370
2002-07-01	73.7587872147800
2002-10-01	73.8448783667339
2003-01-01	72.3836418128957
2003-04-01	73.6771415425743
2003-07-01	73.0200449659130
2003-10-01	73.3746585264590
2004-01-01	72.8998369842657
2004-04-01	74.1599263369880
2004-07-01	73.3888395345764
2004-10-01	73.6961127790043
2005-01-01	72.4808562595612
2005-04-01	73.9689507649592
2005-07-01	73.4131912501725
2005-10-01	74.0620861196953
2006-01-01	73.1003627339506
2006-04-01	74.5353033044176
2006-07-01	74.0376259499818
2006-10-01	74.2462756852863
2007-01-01	73.1467627021010
2007-04-01	74.5769573612551
2007-07-01	74.1184226575486
2007-10-01	74.5703808158854
2008-01-01	73.4549646845420
2008-04-01	74.8282417345509
2008-07-01	74.2503625719179
2008-10-01	74.5144924758049
2009-01-01	72.6631705981338
2009-04-01	73.6890290841733
2009-07-01	73.1284756740403
2009-10-01	73.5870316379693
2010-01-01	72.6541187399223
2010-04-01	74.3715932225949
2010-07-01	73.9321933352702
2010-10-01	74.1833824320726
2011-01-01	73.2407506146038
2011-04-01	75.0454115905204
2011-07-01	74.5050597930816
2011-10-01	74.8715916463343
2012-01-01	73.8408693806129
2012-04-01	75.2242815811225
2012-07-01	74.9860699964316
2012-10-01	74.8892026960522
2013-01-01	73.7983702110595
2013-04-01	75.3796513789878
2013-07-01	75.3538075748959
2013-10-01	75.6945356590103
2014-01-01	75.0774871801956
2014-04-01	75.9477246177345
2014-07-01	75.9568168969170
2014-10-01	76.0908514452874
2015-01-01	75.2864829060189
2015-04-01	76.0578964066962
2015-07-01	76.1717081957600
2015-10-01	76.4405481012202
2016-01-01	75.5627192184324
2016-04-01	76.2549281761782
2016-07-01	76.3699708443869
2016-10-01	76.4657562392570
2017-01-01	75.7930542827877
2017-04-01	76.4640422253196
2017-07-01	76.5251182125087
2017-10-01	76.6138753573726
2018-01-01	76.0035347428288
2018-04-01	76.6331708908613
2018-07-01	76.4286901680196