Quarter	Percent, Seasonally Adjusted
1998-01-01	58.6662716467056
1998-04-01	59.5399554746363
1998-07-01	58.9720840067272
1998-10-01	59.4691081196602
1999-01-01	60.2068952576240
1999-04-01	60.1738791893005
1999-07-01	60.4847222636941
1999-10-01	59.8303620002715
2000-01-01	60.6605514888278
2000-04-01	61.1820289773339
2000-07-01	61.2612211928460
2000-10-01	60.9397533016208
2001-01-01	63.7528174986696
2001-04-01	63.5581919046792
2001-07-01	63.2000305993523
2001-10-01	63.7983502789968
2002-01-01	63.2452587119997
2002-04-01	63.8313596789161
2002-07-01	63.9412451858322
2002-10-01	64.8179310314367
2003-01-01	64.5365788546206
2003-04-01	65.3840895309127
2003-07-01	65.9785783699857
2003-10-01	66.5222456925487
2004-01-01	62.2852084021739
2004-04-01	63.0091347517728
2004-07-01	64.1070900135400
2004-10-01	64.1649954328790
2005-01-01	65.4368045697555
2005-04-01	66.3138976738966
2005-07-01	66.5876596497895
2005-10-01	66.9118481618562
2006-01-01	66.5373198395205
2006-04-01	67.7521943607104
2006-07-01	68.2706227844892
2006-10-01	68.7166871591088
2007-01-01	68.7320922046449
2007-04-01	69.0649701815997
2007-07-01	68.9616582831760
2007-10-01	69.3420797486031
2008-01-01	70.3478385593682
2008-04-01	69.7243008734418
2008-07-01	70.1511307057001
2008-10-01	69.5580248048553
2009-01-01	69.0331782142648
2009-04-01	69.5569384932218
2009-07-01	69.0620708418098
2009-10-01	69.7245228911514
2010-01-01	69.6451668641987
2010-04-01	69.9179701000853
2010-07-01	70.0759913016666
2010-10-01	70.2828549727069
2011-01-01	70.7469678517539
2011-04-01	71.0634897000642
2011-07-01	71.0813569448122
2011-10-01	70.6361722931971
2012-01-01	70.6553324229558
2012-04-01	70.7635289944629
2012-07-01	71.1222872377106
2012-10-01	70.9850193202398
2013-01-01	71.2649513914008
2013-04-01	71.5282919486830
2013-07-01	71.9070372545614
2013-10-01	71.7697922559883
2014-01-01	72.1551400277494
2014-04-01	71.8892849651330
2014-07-01	71.7757653904389
2014-10-01	72.0791327157312
2015-01-01	72.9212931855520
2015-04-01	73.9210804888191
2015-07-01	74.5220847695774
2015-10-01	74.7626174783899
2016-01-01	75.6726812009121
2016-04-01	75.3757789613612
2016-07-01	75.3289996668012
2016-10-01	75.0313019376708
2017-01-01	74.3558445065268
2017-04-01	74.4533424954087
2017-07-01	75.5325524206795
2017-10-01	75.4831576197550
2018-01-01	76.0955451544181
2018-04-01	76.2941087929190