Quarter	US Dollars, sum over component sub-periods
1987-01-01	11909830989.422400
1987-04-01	24997335076.352900
1987-07-01	30844910799.695000
1987-10-01	19495421825.508003
1988-01-01	-1652470903.895600
1988-04-01	17958914475.121098
1988-07-01	27721707951.620400
1988-10-01	-7267570768.393490
1989-01-01	26178873935.834198
1989-04-01	5647252320.229200
1989-07-01	12880850712.515600
1989-10-01	9245213748.875431
1990-01-01	24128900925.129402
1990-04-01	4765841917.350730
1990-07-01	52969298614.253296
1990-10-01	11075865352.978800
1991-01-01	-6327103624.273210
1991-04-01	-11614169480.577501
1991-07-01	-9032872828.289310
1991-10-01	-15733370629.031900
1992-01-01	-5349654884.303980
1992-04-01	-953643999.856825
1992-07-01	63369768469.825400
1992-10-01	-1925367947.925290
1993-01-01	3567339319.698030
1993-04-01	28799944654.467197
1993-07-01	4508369330.953600
1993-10-01	29991316746.450200
1994-01-01	26240874842.998400
1994-04-01	-3626716679.021550
1994-07-01	19745375588.930603
1994-10-01	285046799.563143
1995-01-01	38937674413.611206
1995-04-01	-5907727833.730479
1995-07-01	38746324166.936000
1995-10-01	5519390250.282250
1996-01-01	70377624463.651900
1996-04-01	41644870709.993200
1996-07-01	16348569821.656300
1996-10-01	74871375459.921700
1997-01-01	123600799585.817000
1997-04-01	22865925703.296200
1997-07-01	29783153483.247800
1997-10-01	88967068157.374910
1998-01-01	40969127242.059494
1998-04-01	60070366515.221405
1998-07-01	55148675581.501495
1998-10-01	-107224458198.158000
1999-01-01	122867295453.349000
1999-04-01	31130720799.563700
1999-07-01	-78472778522.441100
1999-10-01	-22113390199.614803
2000-01-01	198723175144.796000
2000-04-01	15082059738.109400
2000-07-01	92729489836.534100
2000-10-01	73137500653.063700
2001-01-01	243938639976.494020
2001-04-01	-79554062241.597300
2001-07-01	-28862091441.557400
2001-10-01	346316092.978695
2002-01-01	-5539724523.162991
2002-04-01	-52289921026.886500
2002-07-01	71197912963.150300
2002-10-01	82910829078.101600
2003-01-01	181629408533.070000
2003-04-01	113190280631.532000
2003-07-01	95174274391.018800
2003-10-01	73429374322.472400
2004-01-01	381682839286.187000
2004-04-01	47889442322.507500
2004-07-01	108048855794.795000
2004-10-01	94087741489.385100
2005-01-01	421923311136.925000
2005-04-01	164989787180.579000
2005-07-01	162318341361.999000
2005-10-01	129185364683.558000
2006-01-01	460157403302.726000
2006-04-01	12825897373.793299
2006-07-01	193252773513.646000
2006-10-01	4283027797.401650
2007-01-01	645841147767.115000
2007-04-01	283969289663.090000
2007-07-01	287940180915.359000
2007-10-01	171981437911.583000
2008-01-01	437477707652.634030
2008-04-01	-619286323537.312000
2008-07-01	-57012471393.870100
2008-10-01	-742585846961.049100
2009-01-01	-172954567679.099000
2009-04-01	-129606053619.013000
2009-07-01	-117684325999.836000
2009-10-01	-50612318463.032300
2010-01-01	237972579949.117980
2010-04-01	123311492732.772000
2010-07-01	157020964901.984000
2010-10-01	-121095450775.219000
2011-01-01	150862186444.981000
2011-04-01	-54508503891.611400
2011-07-01	202394125370.193020
2011-10-01	-132153188681.213010
2012-01-01	37795701106.404600
2012-04-01	-132760157170.922990
2012-07-01	-172436609944.491000
2012-10-01	-165354248504.835000
2013-01-01	-8927794785.686980
2013-04-01	-43684335235.332800
2013-07-01	-200387911514.568000
2013-10-01	-139739867388.620030
2014-01-01	122702330095.062990
2014-04-01	-14521552934.952600
2014-07-01	83925719980.416400
2014-10-01	-55883002163.207800
2015-01-01	40003870643.391600
2015-04-01	-126755927428.048000
2015-07-01	-19742809335.929897
2015-10-01	-78407558654.659600
2016-01-01	-41441334006.403600
2016-04-01	275478878734.985050
2016-07-01	23449967530.710200
2016-10-01	-38366074142.763900
2017-01-01	57239947856.102104
2017-04-01	-38849542708.850000
2017-07-01	68412856282.880100
2017-10-01	172103548148.832000
2018-01-01	175508514733.996000
2018-04-01	-90000721347.714000