Quarter	Units, Seasonally Adjusted
1979-01-01	32153.3527689957
1979-04-01	32035.5457462946
1979-07-01	31651.4431693958
1979-10-01	32347.6567755901
1980-01-01	32459.7016348703
1980-04-01	30797.3438616352
1980-07-01	31342.2781080225
1980-10-01	32005.8438689908
1981-01-01	29686.5378434266
1981-04-01	31066.0510365568
1981-07-01	29683.9409154829
1981-10-01	27882.9739610860
1982-01-01	28092.1794557748
1982-04-01	27154.0793047370
1982-07-01	27615.9820260851
1982-10-01	29088.4574563170
1983-01-01	32186.6276377195
1983-04-01	35769.4957780497
1983-07-01	34182.2495144466
1983-10-01	37787.0166959576
1984-01-01	33338.0111308652
1984-04-01	28080.6364923663
1984-07-01	26988.8511972749
1984-10-01	23454.9754455248
1985-01-01	22592.0891582311
1985-04-01	21403.9929399648
1985-07-01	20631.7382797852
1985-10-01	19591.2998711413
1986-01-01	19110.4032524485
1986-04-01	19297.1787219019
1986-07-01	18331.7054496805
1986-10-01	15972.1905819798
1987-01-01	14698.7387824918
1987-04-01	15975.6610090844
1987-07-01	16730.5809634062
1987-10-01	15862.1475831644
1988-01-01	16270.8563622336
1988-04-01	17606.1031668875
1988-07-01	18346.4049189260
1988-10-01	18906.4068976586
1989-01-01	20661.9724550583
1989-04-01	21635.6650344110
1989-07-01	22840.5295997924
1989-10-01	27025.1889402619
1990-01-01	31017.7824140101
1990-04-01	32286.1694359916
1990-07-01	32603.7150240012
1990-10-01	34411.6947535734
1991-01-01	32985.9375128226
1991-04-01	32123.2464144090
1991-07-01	33993.3024767571
1991-10-01	34359.3813202461
1992-01-01	35677.5499784476
1992-04-01	36288.2556346122
1992-07-01	39858.5073779712
1992-10-01	40234.8258196647
1993-01-01	39262.2738600910
1993-04-01	43256.7343116623
1993-07-01	45890.1343346406
1993-10-01	45303.3853268739
1994-01-01	57845.6338366289
1994-04-01	57657.2847640099
1994-07-01	59087.9451439140
1994-10-01	62726.0237689474
1995-01-01	57354.6367093119
1995-04-01	52253.9625220853
1995-07-01	51273.0506158576
1995-10-01	52824.5914243868
1996-01-01	50229.3299635821
1996-04-01	48579.9712161388
1996-07-01	46887.0046191144
1996-10-01	46156.9374566942
1997-01-01	48053.2627066017
1997-04-01	43706.1271898557
1997-07-01	43125.2742654466
1997-10-01	42511.0429948001
1998-01-01	37258.9476020609
1998-04-01	42646.0867508108
1998-07-01	39479.2794012744
1998-10-01	39829.3621788566
1999-01-01	36301.5667234269
1999-04-01	36884.5241759945
1999-07-01	36898.5504096949
1999-10-01	36275.0323700602
2000-01-01	32676.9000874505
2000-04-01	29005.4314962289
2000-07-01	29148.6972486963
2000-10-01	26056.8228529400
2001-01-01	23868.9961978476
2001-04-01	25962.8984610531
2001-07-01	25507.1941546438
2001-10-01	22164.8953954197
2002-01-01	21610.1088642228
2002-04-01	23234.4136559696
2002-07-01	23112.4773253464
2002-10-01	23482.5701848105
2003-01-01	27985.2784587206
2003-04-01	23717.0520921379
2003-07-01	22428.1561935174
2003-10-01	24505.5306602238
2004-01-01	27257.8896057227
2004-04-01	21846.8375760971
2004-07-01	19523.4207043560
2004-10-01	19826.8579561060
2005-01-01	19658.0638182581
2005-04-01	19176.5397351624
2005-07-01	19912.5088248617
2005-10-01	21204.4944956435
2006-01-01	25601.4261143891
2006-04-01	21211.5189505019
2006-07-01	19140.2532367044
2006-10-01	16239.0095438487
2007-01-01	13758.3646413966
2007-04-01	15885.8209557611
2007-07-01	15796.9155115658
2007-10-01	15062.7910624116
2008-01-01	14511.3272403421
2008-04-01	15444.1985163574
2008-07-01	14393.1188802251
2008-10-01	13498.5335340004
2009-01-01	12974.3162724055
2009-04-01	14861.6817986011
2009-07-01	15221.7481383723
2009-10-01	15979.4297217804
2010-01-01	14762.2137283018
2010-04-01	14671.6139741880
2010-07-01	16673.8905385801
2010-10-01	16431.7678582187
2011-01-01	18482.5810325016
2011-04-01	18934.4710279001
2011-07-01	18622.4436404352
2011-10-01	20138.3329355625
2012-01-01	17599.0072950246
2012-04-01	21101.8171381994
2012-07-01	20273.4273355460
2012-10-01	20471.4307653378
2013-01-01	20642.5749085258
2013-04-01	22101.6660284279
2013-07-01	24334.3046885756
2013-10-01	22792.2527941302
2014-01-01	23085.7630812412
2014-04-01	23800.2510299191
2014-07-01	23997.8125239397
2014-10-01	23975.2726463153
2015-01-01	23752.4412573538
2015-04-01	24173.1032153384
2015-07-01	26425.8052199259
2015-10-01	28253.1648876750
2016-01-01	31104.9815690171
2016-04-01	31066.7180707906
2016-07-01	30178.7502014320
2016-10-01	32644.5194728901
2017-01-01	28497.9192451207
2017-04-01	29369.4868136604
2017-07-01	28487.3442741040
2017-10-01	29727.7219002314
2018-01-01	28771.1835960782
2018-04-01	28793.6017147216