Quarter	Percent, Seasonally Adjusted
1998-01-01	75.0544534828340
1998-04-01	75.2228023979947
1998-07-01	74.6280529497308
1998-10-01	75.2938302060358
1999-01-01	75.2639029022528
1999-04-01	75.7030647217042
1999-07-01	75.7741897763576
1999-10-01	76.0909783494497
2000-01-01	76.9560514364469
2000-04-01	77.0476901308892
2000-07-01	77.8865343561833
2000-10-01	77.6379202301777
2001-01-01	78.6704086061880
2001-04-01	78.0163162041382
2001-07-01	77.8134044627802
2001-10-01	78.0896973575955
2002-01-01	77.6666288073799
2002-04-01	78.3239788884722
2002-07-01	78.7660528793763
2002-10-01	78.5880677709370
2003-01-01	79.3362427317872
2003-04-01	79.8654673155843
2003-07-01	79.5482375901195
2003-10-01	79.7836989658858
2004-01-01	80.0311741837766
2004-04-01	80.4231069922176
2004-07-01	80.5045017113038
2004-10-01	81.1647252068426
2005-01-01	81.2629409773240
2005-04-01	81.5041997239990
2005-07-01	81.7733498128666
2005-10-01	82.2039929273213
2006-01-01	82.3922646885526
2006-04-01	82.7191279189779
2006-07-01	82.6809344163611
2006-10-01	82.7354259665670
2007-01-01	82.6862556034373
2007-04-01	82.6315643836930
2007-07-01	82.8113012832501
2007-10-01	82.7992490650010
2008-01-01	82.7717776085941
2008-04-01	83.2800415016087
2008-07-01	82.8231882065909
2008-10-01	82.7472015709925
2009-01-01	83.1006666830813
2009-04-01	83.1139518513375
2009-07-01	83.1073018560096
2009-10-01	83.7785055025679
2010-01-01	84.6565633183615
2010-04-01	84.9638280729286
2010-07-01	85.1261244362422
2010-10-01	84.6726056468370
2011-01-01	84.5668115375095
2011-04-01	85.3346480049912
2011-07-01	83.8582830990689
2011-10-01	84.2251402638133
2012-01-01	85.0095455417240
2012-04-01	85.2724523829048
2012-07-01	84.8577159260977
2012-10-01	84.9726397190880
2013-01-01	85.1989709859983
2013-04-01	85.3447663974172
2013-07-01	85.3496788361895
2013-10-01	86.2985822894328
2014-01-01	85.7718248510534
2014-04-01	86.1984069137519
2014-07-01	85.6042487604838
2014-10-01	85.7411342837889
2015-01-01	85.9485036014320
2015-04-01	86.4111846928453
2015-07-01	85.6876136830707
2015-10-01	86.1285817521370
2016-01-01	86.4642971250839
2016-04-01	86.1502779889242
2016-07-01	86.9611188992134
2016-10-01	86.7431837469229
2017-01-01	86.9487341223307
2017-04-01	86.8985163565049
2017-07-01	87.1559918516959
2017-10-01	87.1779374226873
2018-01-01	87.2597956263036
2018-04-01	87.5812569011823