Quarter	Percent, Seasonally Adjusted
1999-01-01	19.9632367793803
1999-04-01	20.6418925618196
1999-07-01	20.3777593301734
1999-10-01	20.6463963126789
2000-01-01	16.2598244750378
2000-04-01	17.5869248224075
2000-07-01	21.2019138449722
2000-10-01	17.6518530592890
2001-01-01	16.9106288525279
2001-04-01	17.5904798937645
2001-07-01	21.5911369963017
2001-10-01	19.3246247020166
2002-01-01	17.9619365398148
2002-04-01	18.3615735309405
2002-07-01	21.1862248957637
2002-10-01	20.3388534057444
2003-01-01	17.9551623605107
2003-04-01	18.7848479193879
2003-07-01	20.8253790005615
2003-10-01	18.3275015887357
2004-01-01	17.1308569896637
2004-04-01	17.7870511052141
2004-07-01	19.4034124280512
2004-10-01	17.7840590224072
2005-01-01	16.1530712317617
2005-04-01	16.7939602542522
2005-07-01	19.0948843856739
2005-10-01	16.9163279709898
2006-01-01	16.0099640317080
2006-04-01	15.8328013911206
2006-07-01	17.5535912393086
2006-10-01	16.8269124383174
2007-01-01	15.3097724996423
2007-04-01	15.5577699422556
2007-07-01	18.2691428540695
2007-10-01	15.8909356004600
2008-01-01	15.6756540082274
2008-04-01	16.0792332146551
2008-07-01	17.6440288243509
2008-10-01	18.1511010680253
2009-01-01	18.5208196498204
2009-04-01	18.2282221385324
2009-07-01	21.2124409043854
2009-10-01	19.0358880778589
2010-01-01	17.9840567479415
2010-04-01	17.8190787942723
2010-07-01	20.0847581634606
2010-10-01	19.0039403488479
2011-01-01	17.6810446773967
2011-04-01	17.0332053601093
2011-07-01	20.1826686283506
2011-10-01	19.2288123273732
2012-01-01	17.8454152008548
2012-04-01	18.1649409296173
2012-07-01	21.2953221107154
2012-10-01	19.7031092098937
2013-01-01	19.8272231358550
2013-04-01	19.5142091984543
2013-07-01	22.6636616437944
2013-10-01	21.6885748123208
2014-01-01	21.2466497610925
2014-04-01	20.8662200703058
2014-07-01	24.0492379143748
2014-10-01	23.3522542223049
2015-01-01	22.7964366734908
2015-04-01	21.8812087589502
2015-07-01	25.4642132512419
2015-10-01	23.8511626290664
2016-01-01	24.0494305218474
2016-04-01	22.6148784888040
2016-07-01	25.9012338791412
2016-10-01	23.5132506995843
2017-01-01	23.0773518805182
2017-04-01	22.0757664518649
2017-07-01	24.7247776963644
2017-10-01	22.8361929292510
2018-01-01	22.3066033879636
2018-04-01	21.0431781638496