Quarter	Units, Seasonally Adjusted
1973-01-01	22785.74384051810
1973-04-01	19087.75308190050
1973-07-01	17919.37085137630
1973-10-01	19186.19437349980
1974-01-01	17469.25526852670
1974-04-01	24893.75276604450
1974-07-01	29013.05636464050
1974-10-01	16720.62071158240
1975-01-01	24527.90479216690
1975-04-01	22951.74889541800
1975-07-01	25256.85211482490
1975-10-01	24525.00158082340
1976-01-01	26505.14979306330
1976-04-01	27762.71847697220
1976-07-01	25416.45952877900
1976-10-01	27312.66433362930
1977-01-01	24421.39836696120
1977-04-01	24846.05664912950
1977-07-01	16981.63747162160
1977-10-01	16531.80920019190
1978-01-01	15682.70427712180
1978-04-01	17039.47653382740
1978-07-01	17556.64050094710
1978-10-01	17915.77372314270
1979-01-01	17958.07476953260
1979-04-01	18994.64074648620
1979-07-01	18455.49038528470
1979-10-01	17252.53635929330
1980-01-01	17879.66144063780
1980-04-01	14676.78739096190
1980-07-01	18011.65610391470
1980-10-01	14875.44075852780
1981-01-01	16172.13354432610
1981-04-01	15266.10747726710
1981-07-01	15740.31116823890
1981-10-01	16624.35089350590
1982-01-01	17436.40924210110
1982-04-01	17935.98000006840
1982-07-01	17200.01949584930
1982-10-01	20632.47644573960
1983-01-01	17303.43443846510
1983-04-01	17274.88123287960
1983-07-01	18109.23007852440
1983-10-01	20710.37671811200
1984-01-01	19917.89789934110
1984-04-01	19026.00609709830
1984-07-01	18905.73915577910
1984-10-01	20220.08164461320
1985-01-01	22816.87104242870
1985-04-01	25079.92062540170
1985-07-01	20493.34082298660
1985-10-01	20114.11239258290
1986-01-01	21507.64774230540
1986-04-01	22326.25723468650
1986-07-01	23192.24186757500
1986-10-01	24160.58948584610
1987-01-01	23892.06383538190
1987-04-01	28805.04116116280
1987-07-01	25063.42375393310
1987-10-01	28401.43125750990
1988-01-01	29258.32671805320
1988-04-01	28441.31245795230
1988-07-01	30532.75822979640
1988-10-01	28827.91363545850
1989-01-01	26816.67125989540
1989-04-01	26495.75800576100
1989-07-01	25791.30884646410
1989-10-01	25907.18912506010
1990-01-01	24057.82792483460
1990-04-01	20285.81057963940
1990-07-01	18587.84109164260
1990-10-01	15637.65776331040
1991-01-01	15250.11948616240
1991-04-01	16641.16909487940
1991-07-01	15818.79568945140
1991-10-01	16019.87008923690
1992-01-01	15297.99560795140
1992-04-01	13923.88056780570
1992-07-01	12667.61425475270
1992-10-01	10573.47626353720
1993-01-01	10657.58231384550
1993-04-01	9490.83917545372
1993-07-01	10677.32465316370
1993-10-01	11611.59939374520
1994-01-01	12932.92539348290
1994-04-01	13903.69562919440
1994-07-01	12462.71154319690
1994-10-01	13483.50046523830
1995-01-01	15203.22606585070
1995-04-01	14047.96378443560
1995-07-01	13928.87777936170
1995-10-01	15036.88446159790
1996-01-01	14554.49732058050
1996-04-01	15485.59802104000
1996-07-01	17157.06875092980
1996-10-01	19286.01725990140
1997-01-01	20429.14500000000
1997-04-01	21358.17700000000
1997-07-01	22349.03133333330
1997-10-01	22397.78133333330
1998-01-01	23438.23433333330
1998-04-01	23534.07433333330
1998-07-01	24378.14533333330
1998-10-01	24466.91566666670
1999-01-01	26232.78033333330
1999-04-01	26242.88200000000
1999-07-01	27944.95100000000
1999-10-01	30424.14600000000
2000-01-01	28563.24866666670
2000-04-01	30194.24033333330
2000-07-01	30316.90666666670
2000-10-01	28518.34800000000
2001-01-01	25914.96600000000
2001-04-01	25130.30566666670
2001-07-01	23975.19166666670
2001-10-01	23342.73433333330
2002-01-01	24188.75100000000
2002-04-01	24296.27766666670
2002-07-01	25113.33400000000
2002-10-01	24858.01733333330
2003-01-01	26426.32633333330
2003-04-01	25238.59333333330
2003-07-01	25628.24933333330
2003-10-01	25175.71233333330
2004-01-01	25153.51633333330
2004-04-01	26118.96333333330
2004-07-01	25390.67900000000
2004-10-01	26035.89500000000
2005-01-01	25744.50233333330
2005-04-01	26020.92200000000
2005-07-01	26277.42900000000
2005-10-01	26086.84500000000
2006-01-01	25372.15400000000
2006-04-01	26640.47533333330
2006-07-01	26887.55000000000
2006-10-01	26390.04600000000
2007-01-01	28036.65766666670
2007-04-01	27393.42300000000
2007-07-01	27558.52933333330
2007-10-01	29792.41333333330
2008-01-01	25200.77966666670
2008-04-01	24320.96600000000
2008-07-01	22275.78833333330
2008-10-01	19542.34366666670
2009-01-01	18327.60933333330
2009-04-01	18583.23800000000
2009-07-01	19123.72800000000
2009-10-01	20721.52300000000
2010-01-01	23155.41466666670
2010-04-01	24874.13733333330
2010-07-01	26439.50300000000
2010-10-01	27657.01366666670
2011-01-01	27534.73733333330
2011-04-01	27841.30133333330
2011-07-01	27380.15733333330
2011-10-01	26188.35333333330
2012-01-01	26344.24000000000
2012-04-01	24510.25600000000
2012-07-01	24480.11166666670
2012-10-01	24909.75733333330
2013-01-01	23222.07900000000
2013-04-01	24230.02700000000
2013-07-01	25148.53200000000
2013-10-01	25575.41033333330
2014-01-01	26906.79733333330
2014-04-01	26841.00966666670
2014-07-01	27248.29100000000
2014-10-01	27308.85900000000
2015-01-01	29168.27589695660
2015-04-01	29150.75256414100
2015-07-01	30523.78087556340
2015-10-01	31640.98294580270
2016-01-01	31415.00141016420
2016-04-01	32839.69042779950
2016-07-01	31549.64354236010
2016-10-01	33402.58910705900
2017-01-01	32953.27368949280
2017-04-01	32345.67852059430
2017-07-01	32809.97858342850
2017-10-01	32887.35698254540
2018-01-01	32182.07820645900
2018-04-01	42314.34125746020
2018-07-01	21466.89456965560