Quarter	Percent
1999-07-01	70.1654349974181
1999-10-01	70.8816686716457
2000-01-01	69.1665501292019
2000-04-01	71.1963427732130
2000-07-01	71.5009255073933
2000-10-01	71.1642753462186
2001-01-01	68.6102473836760
2001-04-01	71.8301778509530
2001-07-01	72.0197694263434
2001-10-01	71.8571448549296
2002-01-01	70.8106360778018
2002-04-01	72.8741739494805
2002-07-01	72.9737219562598
2002-10-01	72.7222374157738
2003-01-01	71.2650483126388
2003-04-01	72.4091678734819
2003-07-01	72.2201282210653
2003-10-01	72.3366541051347
2004-01-01	71.5719299183722
2004-04-01	72.8162853711250
2004-07-01	72.3196985044729
2004-10-01	72.5072216467636
2005-01-01	71.0871090873282
2005-04-01	72.6785470279132
2005-07-01	71.9371617296985
2005-10-01	71.7473168313291
2006-01-01	70.5038463533386
2006-04-01	72.2286294442525
2006-07-01	71.9837772791445
2006-10-01	71.7144923820502
2007-01-01	70.6011546757263
2007-04-01	72.3241784699292
2007-07-01	72.0672523382080
2007-10-01	71.7441291358728
2008-01-01	70.2669836909682
2008-04-01	71.9497105057214
2008-07-01	71.5342217035044
2008-10-01	70.8782404543630
2009-01-01	69.0410209101492
2009-04-01	70.9288762479760
2009-07-01	70.5988649069491
2009-10-01	70.3324797692494
2010-01-01	68.7236104061719
2010-04-01	70.9953558783628
2010-07-01	70.8096625038038
2010-10-01	70.5916031468697
2011-01-01	69.3225740573906
2011-04-01	71.3535954860593
2011-07-01	71.0956279567565
2011-10-01	71.0875641185572
2012-01-01	69.7347954319893
2012-04-01	71.7437395899067
2012-07-01	71.6714240108114
2012-10-01	71.0961275102384
2013-01-01	69.5004661602853
2013-04-01	71.7172042960122
2013-07-01	71.6777625442359
2013-10-01	71.6349047023962
2014-01-01	70.6805675754424
2014-04-01	72.1781670583332
2014-07-01	72.2960986505374
2014-10-01	71.7965118351054
2015-01-01	70.4860240173647
2015-04-01	71.9016059662101
2015-07-01	71.8384019195175
2015-10-01	71.4410123965729
2016-01-01	70.0087695535775
2016-04-01	71.5021065919059
2016-07-01	71.8154695572032
2016-10-01	71.5398809468187
2017-01-01	70.2128804135173
2017-04-01	71.7301823124834
2017-07-01	71.6854690844689
2017-10-01	71.3230180538171
2018-01-01	70.1204834689087
2018-04-01	71.2845170053362
2018-07-01	71.0592473371744