Quarter	Units, Seasonally Adjusted
1968-04-01	142391.663900000
1968-07-01	125154.403900000
1968-10-01	145038.983300000
1969-01-01	150840.621000000
1969-04-01	165548.822033333
1969-07-01	187513.738833333
1969-10-01	178280.478566667
1970-01-01	186937.460566667
1970-04-01	196814.509866667
1970-07-01	206141.652766667
1970-10-01	201699.152500000
1971-01-01	194050.700400000
1971-04-01	198676.836966667
1971-07-01	203606.352633333
1971-10-01	210657.924600000
1972-01-01	189628.677866667
1972-04-01	214299.720600000
1972-07-01	227289.595933333
1972-10-01	240910.123433333
1973-01-01	244667.887200000
1973-04-01	256143.449466667
1973-07-01	256464.860600000
1973-10-01	224873.743766667
1974-01-01	162183.786966667
1974-04-01	168469.118266667
1974-07-01	205065.205900000
1974-10-01	226556.215166667
1975-01-01	227080.048600000
1975-04-01	230140.339800000
1975-07-01	234411.528966667
1975-10-01	224821.480166667
1976-01-01	188854.162600000
1976-04-01	203013.699766667
1976-07-01	218061.716033333
1976-10-01	205773.378366667
1977-01-01	208472.260700000
1977-04-01	204749.035500000
1977-07-01	206238.417566667
1977-10-01	214409.346066667
1978-01-01	218442.030466667
1978-04-01	239974.095866667
1978-07-01	244549.595833333
1978-10-01	249551.794866667
1979-01-01	251494.107000000
1979-04-01	255054.184866667
1979-07-01	253893.413100000
1979-10-01	252143.475733333
1980-01-01	247624.040133333
1980-04-01	243386.736400000
1980-07-01	233823.695866667
1980-10-01	226834.270133333
1981-01-01	231843.896800000
1981-04-01	241523.976766667
1981-07-01	237997.294666667
1981-10-01	245186.695200000
1982-01-01	243827.791700000
1982-04-01	257242.345766667
1982-07-01	255357.015600000
1982-10-01	256624.772200000
1983-01-01	255295.492866667
1983-04-01	238938.489166667
1983-07-01	287264.263866667
1983-10-01	263805.243766667
1984-01-01	260571.819833333
1984-04-01	260602.852300000
1984-07-01	254151.948166667
1984-10-01	257042.064800000
1985-01-01	261884.965666667
1985-04-01	251373.174833333
1985-07-01	261531.731566667
1985-10-01	260208.160666667
1986-01-01	260137.467766667
1986-04-01	268346.180066667
1986-07-01	260157.823700000
1986-10-01	260337.943433333
1987-01-01	261968.379466667
1987-04-01	263715.831566667
1987-07-01	279143.158566667
1987-10-01	287090.156766667
1988-01-01	300414.251700000
1988-04-01	306331.433333333
1988-07-01	312288.151833333
1988-10-01	320446.266200000
1989-01-01	287319.924033333
1989-04-01	387754.192733333
1989-07-01	391663.443433333
1989-10-01	410344.927400000
1990-01-01	414357.641433333
1990-04-01	431504.529466667
1990-07-01	433307.457166667
1990-10-01	422211.460966667
1991-01-01	410554.042200000
1991-04-01	407653.756766667
1991-07-01	404884.933466667
1991-10-01	400123.626533333
1992-01-01	383683.783300000
1992-04-01	379349.490166667
1992-07-01	364668.032766667
1992-10-01	357401.223100000
1993-01-01	361776.932700000
1993-04-01	350678.222433333
1993-07-01	343521.771066667
1993-10-01	344247.254000000
1994-01-01	344519.429366667
1994-04-01	350073.906866667
1994-07-01	358210.264900000
1994-10-01	350993.951600000
1995-01-01	366871.358700000
1995-04-01	367277.915900000
1995-07-01	373056.611000000
1995-10-01	374534.999400000
1996-01-01	376081.280066667
1996-04-01	378505.614266667
1996-07-01	390677.897766667
1996-10-01	411437.891533333
1997-01-01	340164.681208335
1997-04-01	269932.720356485
1997-07-01	276487.670870715
1997-10-01	292612.569224859
1998-01-01	263960.504608612
1998-04-01	265046.165048839
1998-07-01	269962.963352225
1998-10-01	244023.404745878
1999-01-01	251159.698543896
1999-04-01	242640.997707620
1999-07-01	238174.261977972
1999-10-01	238540.165226029
2000-01-01	247150.886208717
2000-04-01	250815.430593146
2000-07-01	241866.972701466
2000-10-01	256125.600487815
2001-01-01	248746.373188054
2001-04-01	255007.651785729
2001-07-01	258123.826694470
2001-10-01	246651.649184088
2002-01-01	249525.011576224
2002-04-01	263554.819294177
2002-07-01	267557.721259352
2002-10-01	273626.846511361
2003-01-01	270613.327229769
2003-04-01	261313.784367872
2003-07-01	261625.123470841
2003-10-01	262211.561185224
2004-01-01	284337.244273229
2004-04-01	264774.766291980
2004-07-01	287246.961062128
2004-10-01	291589.020654159
2005-01-01	284925.810349610
2005-04-01	291482.864819611
2005-07-01	277580.117858108
2005-10-01	266885.929281118
2006-01-01	276789.123339669
2006-04-01	264184.603955711
2006-07-01	251402.560060958
2006-10-01	247934.902755615
2007-01-01	250007.172010512
2007-04-01	243254.461552470
2007-07-01	237853.727858487
2007-10-01	252348.405423311
2008-01-01	254778.347975237
2008-04-01	246766.124574411
2008-07-01	225114.901527248
2008-10-01	198722.656315085
2009-01-01	179760.488081473
2009-04-01	203246.521741759
2009-07-01	234890.331977501
2009-10-01	271124.778813632
2010-01-01	251851.317085973
2010-04-01	262382.587623826
2010-07-01	278745.296319556
2010-10-01	187879.113702398
2011-01-01	182878.848565877
2011-04-01	162554.308689614
2011-07-01	219869.101120897
2011-10-01	238767.392688313
2012-01-01	265978.829543812
2012-04-01	263750.460178049
2012-07-01	246543.569970888
2012-10-01	223579.470121142
2013-01-01	227511.211384197
2013-04-01	239483.116041891
2013-07-01	236677.391130997
2013-10-01	260998.640475401
2014-01-01	268222.618740452
2014-04-01	220974.488169428
2014-07-01	230368.950459826
2014-10-01	225627.344025550
2015-01-01	221381.552286979
2015-04-01	225119.948689642
2015-07-01	229236.226531906
2015-10-01	225877.077203532
2016-01-01	215910.154344071
2016-04-01	237084.580919259
2016-07-01	236825.721117967
2016-10-01	248018.299236455
2017-01-01	246055.491299773
2017-04-01	253401.744298536
2017-07-01	241810.858910300
2017-10-01	239812.824714735
2018-01-01	233787.283523011
2018-04-01	242245.228385155
2018-07-01	242024.138546794