Quarter	Percent, Seasonally Adjusted
1998-01-01	17.7544487480893
1998-04-01	18.0071981615510
1998-07-01	18.4424633778854
1998-10-01	18.2718087205488
1999-01-01	18.0638414140896
1999-04-01	18.0677019346724
1999-07-01	18.0169054849671
1999-10-01	17.9737343262920
2000-01-01	18.0031223763357
2000-04-01	18.1612444790649
2000-07-01	18.2656615799640
2000-10-01	18.4892268995845
2001-01-01	17.8145539562219
2001-04-01	18.2917987230914
2001-07-01	18.1073094431235
2001-10-01	18.5041233763741
2002-01-01	18.6964170254070
2002-04-01	18.5620031983263
2002-07-01	18.4320763152290
2002-10-01	18.3146385437862
2003-01-01	18.5414085970078
2003-04-01	18.6586330119004
2003-07-01	19.3997175211611
2003-10-01	19.3784947985297
2004-01-01	19.2292541539068
2004-04-01	19.2053487364584
2004-07-01	19.0720038321521
2004-10-01	18.9473984904895
2005-01-01	19.0358267582281
2005-04-01	18.3812281799093
2005-07-01	18.1063016314076
2005-10-01	18.1471058946222
2006-01-01	18.1448243456095
2006-04-01	18.6662912632198
2006-07-01	18.9360527102610
2006-10-01	19.1848047964069
2007-01-01	19.2643868035095
2007-04-01	19.6452377876892
2007-07-01	19.9098057903435
2007-10-01	20.0105691920824
2008-01-01	20.2313387492835
2008-04-01	20.3457181158129
2008-07-01	20.4353570298661
2008-10-01	20.7498222245748
2009-01-01	20.6588094161397
2009-04-01	20.1999448821609
2009-07-01	19.8346010864924
2009-10-01	19.6991637416444
2010-01-01	20.0899874558210
2010-04-01	20.2195790569824
2010-07-01	20.2559354693083
2010-10-01	20.3274962794271
2011-01-01	19.9387689511798
2011-04-01	19.6142793341675
2011-07-01	19.5210340582983
2011-10-01	19.2424126987074
2012-01-01	19.5869272073288
2012-04-01	19.3137051699113
2012-07-01	18.7624841135561
2012-10-01	18.7623952756362
2013-01-01	18.4770377365357
2013-04-01	17.8259722250722
2013-07-01	17.9217254930033
2013-10-01	18.0002680244643
2014-01-01	18.1332368863096
2014-04-01	18.6602715431092
2014-07-01	18.7709533642868
2014-10-01	18.1705223867856
2015-01-01	18.2804557468619
2015-04-01	18.6757542327856
2015-07-01	18.6409546494838
2015-10-01	18.6216863304572
2016-01-01	18.2219731530866
2016-04-01	17.9521524240535
2016-07-01	17.9395626149386
2016-10-01	17.6474021805413
2017-01-01	18.0763005524315
2017-04-01	17.8772034491372
2017-07-01	17.5947990824304
2017-10-01	17.9605223983384
2018-01-01	17.9406894607451
2018-04-01	17.8070510619590