Quarter	Percent, Seasonally Adjusted
1998-01-01	64.8198350671801
1998-04-01	64.7990206141489
1998-07-01	64.5328916231527
1998-10-01	64.8108245751121
1999-01-01	64.7588755539104
1999-04-01	64.9357853427304
1999-07-01	64.9354766976951
1999-10-01	64.8966944176615
2000-01-01	65.3113306935767
2000-04-01	65.2324282523433
2000-07-01	65.6745525813269
2000-10-01	65.6310247296694
2001-01-01	66.0238256301425
2001-04-01	65.9612857396208
2001-07-01	66.1023827369122
2001-10-01	66.3158884050743
2002-01-01	66.4006114250149
2002-04-01	66.5874987507588
2002-07-01	66.8146711220281
2002-10-01	66.6750295579887
2003-01-01	66.8918331993365
2003-04-01	66.7339936017017
2003-07-01	66.6342974780825
2003-10-01	66.5819341782428
2004-01-01	66.3983034074141
2004-04-01	66.4582365368575
2004-07-01	66.5282031741084
2004-10-01	66.6299891885587
2005-01-01	66.6353943835313
2005-04-01	66.8268275456335
2005-07-01	67.0433797579737
2005-10-01	67.1706216707836
2006-01-01	67.0822847072628
2006-04-01	67.3094284922246
2006-07-01	67.3773373836413
2006-10-01	67.3311495736005
2007-01-01	67.5056711315407
2007-04-01	67.3538809936291
2007-07-01	67.7826157291842
2007-10-01	67.6381561250407
2008-01-01	67.5531791775726
2008-04-01	67.7206090622172
2008-07-01	67.5728782594189
2008-10-01	67.3346660754772
2009-01-01	67.2253727026838
2009-04-01	67.0821759085227
2009-07-01	66.8196760592772
2009-10-01	66.9706471606319
2010-01-01	67.2577315686398
2010-04-01	67.0787157832374
2010-07-01	67.0102834713012
2010-10-01	66.8927163679564
2011-01-01	66.8297208788460
2011-04-01	66.9603539595127
2011-07-01	66.7009316916750
2011-10-01	66.2778115633177
2012-01-01	66.5136004533208
2012-04-01	66.5904229835318
2012-07-01	66.6104334077609
2012-10-01	66.0516070956019
2013-01-01	65.7321476852198
2013-04-01	65.7220506556565
2013-07-01	65.7353247796160
2013-10-01	65.9582716715432
2014-01-01	65.5181182749856
2014-04-01	65.6958428641787
2014-07-01	65.6833081501076
2014-10-01	65.3690125134162
2015-01-01	65.5122050944938
2015-04-01	65.5713577484710
2015-07-01	65.3765911881520
2015-10-01	65.6020811939353
2016-01-01	65.3415217768839
2016-04-01	65.3494603843446
2016-07-01	65.7680608967770
2016-10-01	65.7155188552175
2017-01-01	65.8824708640165
2017-04-01	66.1432217668056
2017-07-01	66.3758900973010
2017-10-01	66.3719148778172
2018-01-01	66.4018337806477
2018-04-01	66.4303656689881