Quarter	Units, Seasonally Adjusted
1968-01-01	5379.94833014263
1968-04-01	5385.27642034392
1968-07-01	4786.43149553732
1968-10-01	5675.50421435230
1969-01-01	6140.62810060647
1969-04-01	6070.10583416936
1969-07-01	6465.91447172322
1969-10-01	5588.04254785936
1970-01-01	5061.62262930783
1970-04-01	5183.84929733129
1970-07-01	5542.91376361299
1970-10-01	4267.58031052819
1971-01-01	4270.73311793135
1971-04-01	3147.76806423307
1971-07-01	3964.04994760808
1971-10-01	4322.50854767929
1972-01-01	5191.86241852296
1972-04-01	5868.36309073552
1972-07-01	5631.59217390475
1972-10-01	8199.14012256958
1973-01-01	6817.17404905634
1973-04-01	6537.80063423666
1973-07-01	7199.42327669095
1973-10-01	6132.79559692273
1974-01-01	7439.62186717462
1974-04-01	8070.40940824539
1974-07-01	8350.85904894981
1974-10-01	5472.82580663860
1975-01-01	5934.77520843792
1975-04-01	5858.69543313811
1975-07-01	6214.08451585820
1975-10-01	7260.20397533448
1976-01-01	7904.29250106192
1976-04-01	7753.71221044026
1976-07-01	7379.48149869687
1976-10-01	8348.17294121386
1977-01-01	5535.42588767687
1977-04-01	7048.16723986022
1977-07-01	6512.60183946198
1977-10-01	6439.52058512617
1978-01-01	6753.73782705474
1978-04-01	6322.35543822454
1978-07-01	6115.87402298972
1978-10-01	5761.66613576204
1979-01-01	5438.08587506969
1979-04-01	5204.07684682648
1979-07-01	5058.36721641917
1979-10-01	4968.16933154310
1980-01-01	4994.56438495776
1980-04-01	4427.05459045870
1980-07-01	4037.31857490680
1980-10-01	3289.97588595496
1981-01-01	3183.01171922164
1981-04-01	2834.34814120288
1981-07-01	2801.21728352664
1981-10-01	2693.85693535498
1982-01-01	2471.62679664529
1982-04-01	2431.90943615081
1982-07-01	2020.23738165486
1982-10-01	2069.94079374990
1983-01-01	1848.89649827879
1983-04-01	2068.79074117635
1983-07-01	1752.10585500804
1983-10-01	1999.95081130640
1984-01-01	2230.83279995026
1984-04-01	2316.70742770269
1984-07-01	2403.51291506906
1984-10-01	2248.50379374498
1985-01-01	2518.24058617753
1985-04-01	2681.24946726042
1985-07-01	2526.41705125800
1985-10-01	2337.99154098253
1986-01-01	2318.38684244182
1986-04-01	2578.17796930549
1986-07-01	2471.37983971126
1986-10-01	2440.61623568507
1987-01-01	2882.32580173975
1987-04-01	3031.91079559401
1987-07-01	3279.66377339442
1987-10-01	3239.28866038128
1988-01-01	3443.04648329025
1988-04-01	3594.77345961832
1988-07-01	3778.82060432378
1988-10-01	4205.39112285579
1989-01-01	3704.84152733362
1989-04-01	4268.43682485700
1989-07-01	4397.36630193509
1989-10-01	4296.25682891766
1990-01-01	4765.18000121139
1990-04-01	4109.37831648504
1990-07-01	4053.11531170282
1990-10-01	4065.10425157505
1991-01-01	3689.46250987787
1991-04-01	4042.40296016461
1991-07-01	3826.72200008857
1991-10-01	3913.39534259303
1992-01-01	4400.35900287851
1992-04-01	4083.24964684844
1992-07-01	3976.93900526804
1992-10-01	4095.93713800953
1993-01-01	4398.45518395013
1993-04-01	4721.69828361360
1993-07-01	4607.25153165616
1993-10-01	4518.78409313313
1994-01-01	4777.09443092464
1994-04-01	4599.36109762251
1994-07-01	4896.97265442481
1994-10-01	4226.17317651670
1995-01-01	4010.32541725306
1995-04-01	3624.20832455609
1995-07-01	3396.36415098638
1995-10-01	3685.77620293409
1996-01-01	3694.08308946094
1996-04-01	4430.27301285518
1996-07-01	4220.79383480442
1996-10-01	3789.33230325202
1997-01-01	3385.87660981688
1997-04-01	3736.23725083557
1997-07-01	4146.06633011712
1997-10-01	5490.52475201519
1998-01-01	2526.86588146559
1998-04-01	3402.33382042730
1998-07-01	3502.56897240848
1998-10-01	3115.09996118424
1999-01-01	3544.96834021899
1999-04-01	3712.62098641795
1999-07-01	3819.53832627742
1999-10-01	4109.72090436170
2000-01-01	3774.70839530080
2000-04-01	3499.47313025610
2000-07-01	3588.61183234589
2000-10-01	3487.08011099114
2001-01-01	3699.47564609408
2001-04-01	3396.93116470691
2001-07-01	3326.47751234743
2001-10-01	3355.25461670703
2002-01-01	3325.45558046358
2002-04-01	3452.20371113236
2002-07-01	3811.55288505343
2002-10-01	3524.49934636659
2003-01-01	3474.70733789155
2003-04-01	3697.89801405269
2003-07-01	3836.14783647748
2003-10-01	4017.36042932244
2004-01-01	4545.54930126092
2004-04-01	4232.65867425694
2004-07-01	3963.79768290024
2004-10-01	4547.59887478255
2005-01-01	4509.65782322875
2005-04-01	5129.04349205525
2005-07-01	4897.51803691075
2005-10-01	5246.72645781199
2006-01-01	5366.07746034988
2006-04-01	5131.94161018553
2006-07-01	4979.95365549999
2006-10-01	4935.41306490322
2007-01-01	4551.07460955672
2007-04-01	4341.10055012628
2007-07-01	4369.00264599095
2007-10-01	4796.82463610233
2008-01-01	4641.53282477728
2008-04-01	4212.05147725266
2008-07-01	4126.24334293295
2008-10-01	4642.51833609592
2009-01-01	3585.43153560425
2009-04-01	3764.67752652333
2009-07-01	4068.28219985664
2009-10-01	3889.46654201044
2010-01-01	4278.04788223537
2010-04-01	5399.69163765156
2010-07-01	3640.49580671202
2010-10-01	3296.55430069472
2011-01-01	3267.47232908111
2011-04-01	3339.28445834677
2011-07-01	3734.03556097354
2011-10-01	4565.81592112293
2012-01-01	4227.39326047034
2012-04-01	3887.68163298228
2012-07-01	3668.98304431694
2012-10-01	3781.86816246148
2013-01-01	3938.29215573063
2013-04-01	3956.49399304081
2013-07-01	4041.37757684003
2013-10-01	4551.53635445026
2014-01-01	5661.73066988302
2014-04-01	4976.63895576689
2014-07-01	3739.39295891782
2014-10-01	3662.99927547082
2015-01-01	3399.90908677086
2015-04-01	3730.41888494358
2015-07-01	4254.77285262751
2015-10-01	4059.99752940943
2016-01-01	4846.51648989433
2016-04-01	4714.54011596075
2016-07-01	3812.19753287757
2016-10-01	3493.48947112770
2017-01-01	3696.84729242235
2017-04-01	4238.11689127416
2017-07-01	3715.59675541603
2017-10-01	5251.54294848312