Quarter	Percent, Seasonally Adjusted
1999-01-01	84.2699988736041
1999-04-01	84.3758911562175
1999-07-01	84.2411138625864
1999-10-01	84.4744813885162
2000-01-01	84.2933625921666
2000-04-01	84.2677630586898
2000-07-01	84.4721737840976
2000-10-01	84.6828495539292
2001-01-01	84.4623106604928
2001-04-01	84.1869223359795
2001-07-01	84.1765056538920
2001-10-01	84.0085041879044
2002-01-01	84.3623360736979
2002-04-01	84.2009696931607
2002-07-01	84.3253820216234
2002-10-01	84.4570820513518
2003-01-01	84.3518135599176
2003-04-01	84.8289117214308
2003-07-01	85.0221375198762
2003-10-01	85.1445413853843
2004-01-01	85.1528447472869
2004-04-01	84.9916685151430
2004-07-01	84.8747924949704
2004-10-01	84.8889954256299
2005-01-01	85.0113080647420
2005-04-01	85.1699472292456
2005-07-01	85.8686888859054
2005-10-01	85.9494248992430
2006-01-01	86.4184251770384
2006-04-01	87.0437249195447
2006-07-01	86.8942854705460
2006-10-01	87.2585950017660
2007-01-01	87.1750537463358
2007-04-01	87.2914074485195
2007-07-01	87.2434167164179
2007-10-01	87.1591357266235
2008-01-01	87.2132284721691
2008-04-01	87.2386512773098
2008-07-01	87.6359661253637
2008-10-01	87.2636376139321
2009-01-01	87.2058607662114
2009-04-01	87.2343959050798
2009-07-01	86.7932174175895
2009-10-01	87.1551297646548
2010-01-01	87.1377002487590
2010-04-01	87.2437007458836
2010-07-01	87.3835495747972
2010-10-01	87.5522242628756
2011-01-01	87.5106236254588
2011-04-01	88.1167102852240
2011-07-01	88.5078675677891
2011-10-01	88.7773773823707
2012-01-01	89.3320944106313
2012-04-01	89.2961865653868
2012-07-01	89.4031025639210
2012-10-01	89.5443134188585
2013-01-01	88.6835443594234
2013-04-01	89.6811702725710
2013-07-01	89.8390310191265
2013-10-01	89.8045999621446
2014-01-01	90.9315739690652
2014-04-01	91.0332224438401
2014-07-01	91.4369304713238
2014-10-01	91.4324228457179
2015-01-01	91.7405204273762
2015-04-01	91.8108472144007
2015-07-01	92.0667938061008
2015-10-01	92.2434937415078
2016-01-01	92.1963325336391
2016-04-01	92.4443155318229
2016-07-01	92.3036427261079
2016-10-01	92.5081229333313
2017-01-01	92.9400252836372
2017-04-01	93.3498765664899
2017-07-01	93.2979812760585
2017-10-01	93.4968437807185
2018-01-01	93.8363637563155
2018-04-01	93.5474563775133