Quarter	Percent, Seasonally Adjusted
1999-01-01	62.2890759663027
1999-04-01	62.3240826716366
1999-07-01	61.9390301067138
1999-10-01	62.1768852799947
2000-01-01	62.1995573379474
2000-04-01	62.4481347807742
2000-07-01	63.3590026962213
2000-10-01	63.3032642078520
2001-01-01	63.7871333279814
2001-04-01	63.3811614684431
2001-07-01	64.3902217220504
2001-10-01	63.6620540576156
2002-01-01	64.4865074260915
2002-04-01	64.0835326803741
2002-07-01	62.6940407317890
2002-10-01	62.4805058640418
2003-01-01	62.7002469698543
2003-04-01	62.2580642060950
2003-07-01	61.7248574069923
2003-10-01	63.5494113565018
2004-01-01	64.5337324868340
2004-04-01	65.4051158495432
2004-07-01	66.0418025798310
2004-10-01	65.1640350392039
2005-01-01	65.8789831578401
2005-04-01	65.7811903897498
2005-07-01	65.8636537704844
2005-10-01	66.2919198856835
2006-01-01	66.6915043815440
2006-04-01	66.9113439150027
2006-07-01	66.4213662566755
2006-10-01	66.2704087412928
2007-01-01	66.8077842346655
2007-04-01	68.1271589821410
2007-07-01	68.2638343313976
2007-10-01	67.8809183969723
2008-01-01	67.9052945899025
2008-04-01	68.1017679841564
2008-07-01	69.3077191986141
2008-10-01	68.9833235655943
2009-01-01	67.4721120105372
2009-04-01	67.4704357896287
2009-07-01	67.5693870000146
2009-10-01	67.6010418285605
2010-01-01	67.1369920502807
2010-04-01	66.3297351822923
2010-07-01	65.4889888274548
2010-10-01	65.8513584827998
2011-01-01	64.5802013839194
2011-04-01	64.2725586341810
2011-07-01	64.2673857587702
2011-10-01	64.4939387569601
2012-01-01	64.8597504916999
2012-04-01	63.6136785730818
2012-07-01	63.5498458506925
2012-10-01	64.2762507762357
2013-01-01	63.2576812212342
2013-04-01	62.7854917433982
2013-07-01	63.7071147824254
2013-10-01	63.2805737756639
2014-01-01	63.3591841669694
2014-04-01	64.2426769386196
2014-07-01	63.8195721565475
2014-10-01	64.0879644445244
2015-01-01	64.4485775083230
2015-04-01	65.2432336497867
2015-07-01	65.8880634187564
2015-10-01	65.3096539649001
2016-01-01	65.0696909046606
2016-04-01	65.9604688181574
2016-07-01	65.6247684557749
2016-10-01	66.6625500962852
2017-01-01	68.1686705624635
2017-04-01	68.8362548085679
2017-07-01	69.6333705728129
2017-10-01	70.4264940969588
2018-01-01	70.5367089877976
2018-04-01	70.8908228806833