Quarter	Percent, Seasonally Adjusted
1999-01-01	66.0146031836844
1999-04-01	66.9015654601428
1999-07-01	66.0056544163729
1999-10-01	66.2133828111884
2000-01-01	65.7644867202754
2000-04-01	65.8315009407752
2000-07-01	66.9305569585589
2000-10-01	66.8108352725834
2001-01-01	67.1607719436491
2001-04-01	66.8601639918359
2001-07-01	67.4697629926672
2001-10-01	66.7867917256891
2002-01-01	68.2060517873068
2002-04-01	66.8527912979840
2002-07-01	65.2822429563175
2002-10-01	65.2508930614194
2003-01-01	65.8361851934990
2003-04-01	65.7299933069864
2003-07-01	65.0904832008617
2003-10-01	66.9823351271745
2004-01-01	67.8005125329014
2004-04-01	68.2142690867613
2004-07-01	68.8650376739623
2004-10-01	68.7072670591618
2005-01-01	69.0736808566746
2005-04-01	68.0170229260496
2005-07-01	68.7297347969701
2005-10-01	69.7494865464938
2006-01-01	69.0860384963866
2006-04-01	68.8431414251810
2006-07-01	68.8176445192426
2006-10-01	68.4203548792378
2007-01-01	68.9233030578086
2007-04-01	70.0169454874529
2007-07-01	69.7164354741107
2007-10-01	69.2827642404965
2008-01-01	68.8443209998361
2008-04-01	69.0130524786229
2008-07-01	69.8472976993277
2008-10-01	68.4304709550480
2009-01-01	67.7625783433846
2009-04-01	69.0717560555402
2009-07-01	69.3952311497086
2009-10-01	69.4286557074046
2010-01-01	69.5764378185375
2010-04-01	68.7410049495932
2010-07-01	68.9235179369385
2010-10-01	69.2699344144219
2011-01-01	67.7692089079660
2011-04-01	67.7674686511479
2011-07-01	67.5614934900980
2011-10-01	67.3206353704282
2012-01-01	67.0270961625693
2012-04-01	66.3133664658309
2012-07-01	67.0154686046042
2012-10-01	67.9083467436219
2013-01-01	67.3795361240994
2013-04-01	67.3962953998881
2013-07-01	67.3016352671559
2013-10-01	67.1926859832010
2014-01-01	67.4319224763169
2014-04-01	67.7564325630509
2014-07-01	67.3618148571989
2014-10-01	67.9376525412709
2015-01-01	67.7731679420952
2015-04-01	67.8247068832314
2015-07-01	68.0856802080275
2015-10-01	66.7594509892020
2016-01-01	66.0074897264980
2016-04-01	66.3227242236175
2016-07-01	65.8435813675708
2016-10-01	66.7549349204660
2017-01-01	67.9775376325512
2017-04-01	68.1290266180070
2017-07-01	68.3700342380154
2017-10-01	68.4993504331759
2018-01-01	68.9299749276507
2018-04-01	69.6448940320604