Quarter	Percent, Seasonally Adjusted
1999-04-01	69.7787421653023
1999-07-01	70.4355325413033
1999-10-01	70.9363085244212
2000-01-01	71.2546765107722
2000-04-01	71.6468902601764
2000-07-01	71.7809677782530
2000-10-01	71.7951988220994
2001-01-01	72.0359868694461
2001-04-01	72.0762746567721
2001-07-01	72.0961179849020
2001-10-01	71.7373376480270
2002-01-01	71.2259252813774
2002-04-01	70.9925810272295
2002-07-01	70.7266289230698
2002-10-01	70.6631816075339
2003-01-01	70.5588015405602
2003-04-01	70.6563920184354
2003-07-01	70.4193267025947
2003-10-01	70.9195027085732
2004-01-01	71.2401009765063
2004-04-01	71.0000521687260
2004-07-01	71.3575980625437
2004-10-01	71.4779004101048
2005-01-01	71.6459721491698
2005-04-01	71.9873166147690
2005-07-01	72.4413876050698
2005-10-01	72.5580836460589
2006-01-01	73.0551767693212
2006-04-01	73.0926704834402
2006-07-01	73.1788046014695
2006-10-01	73.5592911158815
2007-01-01	76.2968741542794
2007-04-01	75.9573500587030
2007-07-01	75.6771331196386
2007-10-01	75.1998271105689
2008-01-01	74.5809813864018
2008-04-01	73.6439100661731
2008-07-01	72.0937233060922
2008-10-01	70.0782577719058
2009-01-01	66.7734046723356
2009-04-01	64.7679648904114
2009-07-01	63.0745764724383
2009-10-01	62.1993935921948
2010-01-01	61.6306140837892
2010-04-01	61.2762871200691
2010-07-01	60.8599771753984
2010-10-01	60.0668033988150
2011-01-01	60.0032475308080
2011-04-01	59.8904691302149
2011-07-01	59.3941937590969
2011-10-01	59.7722584070264
2012-01-01	59.3604614353957
2012-04-01	59.3312015504887
2012-07-01	59.6042244496112
2012-10-01	59.8106064501847
2013-01-01	60.7907926136228
2013-04-01	61.4053810451556
2013-07-01	62.0867760990042
2013-10-01	62.8688760861637
2014-01-01	62.8457294739165
2014-04-01	62.9738933911277
2014-07-01	63.5477117677683
2014-10-01	64.2223235205429
2015-01-01	64.6970581106947
2015-04-01	65.1770488245160
2015-07-01	65.3118485054920
2015-10-01	65.2391598524928
2016-01-01	65.6566025062356
2016-04-01	66.3827779558461
2016-07-01	66.7728540447757
2016-10-01	67.0304208160261
2017-01-01	67.1126550114254
2017-04-01	67.2876087222361
2017-07-01	67.6092498570424
2017-10-01	68.0780338807100
2018-01-01	68.4780726213692
2018-04-01	68.3338886266240