Quarter	US Dollars, monthly level
1960-01-01	-6169098.2293722000
1960-04-01	-6036745.4068336100
1960-07-01	-1837270.3412102300
1960-10-01	-7349081.3648409100
1961-01-01	2362204.7244131500
1961-04-01	-4199475.0656233800
1961-07-01	-2898084.0444401500
1961-10-01	464468.1839297400
1962-01-01	4412447.7473325300
1962-04-01	-5573618.2071568800
1962-07-01	-1393404.5517892200
1962-10-01	-2554575.0116135697
1963-01-01	1161170.4598243500
1963-04-01	-11843938.6902084000
1963-07-01	-6502554.5750163600
1963-10-01	928936.3678594790
1964-01-01	1857872.7357189600
1964-04-01	-15559684.1616462990
1964-07-01	-1161170.4598243500
1964-10-01	-5109150.0232271390
1965-01-01	-232234.0919648700
1965-04-01	-8824895.4946650490
1965-07-01	-1625638.6437540900
1965-10-01	1857872.7357189600
1966-01-01	232234.0919648700
1966-04-01	-14862981.8857517000
1966-07-01	-7199256.8509109600
1966-10-01	3251277.2875081800
1967-01-01	-7431490.9428758300
1967-04-01	-27403622.8518546000
1967-07-01	-16256386.4375409000
1967-10-01	-12570710.2451325000
1968-01-01	-9286840.7219169500
1968-04-01	-18573681.4438339000
1968-07-01	-20325915.5423088000
1968-10-01	-5648549.9758894590
1969-01-01	-5788876.2769619200
1969-04-01	-6242905.7888805100
1969-07-01	-2383654.9375725603
1969-10-01	-1475595.9137353900
1970-01-01	-113507.3779796460
1970-04-01	2724177.0715114900
1970-07-01	3745743.4733283000
1970-10-01	-17026106.6969468000
1971-01-01	-12599318.9557407000
1971-04-01	-15323496.0272522000
1971-07-01	-6719766.7443970200
1971-10-01	-25394646.5339681000
1972-01-01	-4690002.2878049200
1972-04-01	-13955616.5637122000
1972-07-01	-1487073.8961332700
1972-10-01	-21995788.8405101970
1973-01-01	-3737373.7013713400
1973-04-01	-9127358.3875517100
1973-07-01	-8212368.8534938395
1973-10-01	-46300716.0167994000
1974-01-01	-29194430.3016677000
1974-04-01	-54126800.4913941000
1974-07-01	-34989049.2912814000
1974-10-01	-75689270.1712174000
1975-01-01	-54671380.8561387960
1975-04-01	-41892085.8179494000
1975-07-01	-34776153.2357485000
1975-10-01	-49963189.5392464000
1976-01-01	-28261694.0034975970
1976-04-01	4964665.4387445700
1976-07-01	-6695573.9430990000
1976-10-01	-36829408.5324821000
1977-01-01	732959.9277075420
1977-04-01	-34292685.3053957000
1977-07-01	-12642813.2769222000
1977-10-01	-47680946.1316897050
1978-01-01	-21645748.2335124000
1978-04-01	-36432612.0019397960
1978-07-01	9818578.3645468110
1978-10-01	12061146.9010873000
1979-01-01	-7309973.4485472900
1979-04-01	-7200559.7124206500
1979-07-01	-18413657.0474372000
1979-10-01	-3181198.6783803200
1980-01-01	-44884832.6056683960
1980-04-01	-32663180.6745381000
1980-07-01	-5514340.3350187900
1980-10-01	1742088.2219868800
1981-01-01	-40123231.7578898000
1981-04-01	-28189047.0817157000
1981-07-01	-11264054.9306502000
1981-10-01	-51204933.6570866000
1982-01-01	-59296119.8628585040
1982-04-01	-73880973.7784735000
1982-07-01	-78812629.6863644100
1982-10-01	-48804005.0956004040
1983-01-01	-9783445.3189636110
1983-04-01	-14154271.7981275990
1983-07-01	-7128639.5102508300
1983-10-01	-44161928.4287666000
1984-01-01	-22456682.0496319980
1984-04-01	-50156616.0172670000
1984-07-01	-19304891.4623611980
1984-10-01	-10746917.2261250990
1985-01-01	-38614030.3987925950
1985-04-01	-15159481.9455557990
1985-07-01	-6999368.7305909800
1985-10-01	-31814923.3623194000
1986-01-01	-12786434.6791928990
1986-04-01	27831546.5370114000
1986-07-01	7508329.3341722200
1986-10-01	-79863326.3595058000
1987-01-01	-63240625.5529193060
1987-04-01	29104339.3929978000
1987-07-01	-53187025.0078703000
1987-10-01	-126220370.8369290000
1988-01-01	-81944898.0481301000
1988-04-01	-24334649.6319414970
1988-07-01	-12852498.2038441000
1988-10-01	-55995414.8066195000
1989-01-01	28516057.6814281980
1989-04-01	-16039234.0667449010
1989-07-01	15759475.4567190990
1989-10-01	-22408041.9959927000
1990-01-01	34953623.2822314950
1990-04-01	-51867735.2307099000
1990-07-01	16373147.3038248000
1990-10-01	-71552392.4266846000
1991-01-01	2976500.5044265800
1991-04-01	-79412166.6339670000
1991-07-01	-30055499.9167335000
1991-10-01	-59409767.3847581000
1992-01-01	102765.7064600940
1992-04-01	-23794110.1295669000
1992-07-01	-40953740.6690900000
1992-10-01	-92803640.9413518000
1993-01-01	21974922.2101351020
1993-04-01	-6561168.8704830900
1993-07-01	25581416.2623089000
1993-10-01	6336234.4040662300
1994-01-01	93479241.4034353000
1994-04-01	20116051.8894408980
1994-07-01	31782056.7121034970
1994-10-01	8388764.9155178600
1995-01-01	57299833.6532142000
1995-04-01	4258581.1191939500
1995-07-01	-1177433.0728916000
1995-10-01	-15361591.5860547000
1996-01-01	41996377.0905875000
1996-04-01	-52198815.4281504000
1996-07-01	-81413923.9022589000
1996-10-01	-53156710.8728706000
1997-01-01	38346943.4694770000
1997-04-01	-70398514.6355356100
1997-07-01	-75548970.9828060000
1997-10-01	-60168445.7016712950
1998-01-01	-191128552.2443860000
1998-04-01	-121422741.5147610000
1998-07-01	-109891483.4886040100
1998-10-01	-131164070.4325320000
1999-01-01	-61326063.3879022000
1999-04-01	-183677050.3924000000
1999-07-01	-171834635.2912940000
1999-10-01	-96135689.0374027000
2000-01-01	-119268993.5303520000
2000-04-01	-213286153.9735680200
2000-07-01	-168548333.0027330000
2000-10-01	-180362708.8956560000
2001-01-01	-131081223.9525020000
2001-04-01	-71367607.0366250000
2001-07-01	-100169878.8318360000
2001-10-01	37670257.7154162000
2002-01-01	15717424.3307557980
2002-04-01	5299195.1120506290
2002-07-01	-40592506.1762284040
2002-10-01	-21959232.9816361000
2003-01-01	35606589.4538738000
2003-04-01	-156183928.3157960000
2003-07-01	-191921255.9306050000
2003-10-01	-132992134.9235860000
2004-01-01	-72742773.5222792000
2004-04-01	-262713397.4433480000
2004-07-01	-246105104.0945770000
2004-10-01	-243598878.3650550000
2005-01-01	-335386858.4698829700
2005-04-01	-412316598.5235719700
2005-07-01	-629619620.2019720000
2005-10-01	-520261642.3895510000
2006-01-01	-600154539.0151210000
2006-04-01	-656535234.6802031000
2006-07-01	-672936900.8843740000
2006-10-01	-776659950.5960960000
2007-01-01	-352820298.6537050000
2007-04-01	-627753484.4610189000
2007-07-01	-707491675.9984889000
2007-10-01	-444235828.9159400000
2008-01-01	-493794977.4967140600
2008-04-01	-145423369.5452910000
2008-07-01	-285773402.5282070000
2008-10-01	221156781.7184050000
2009-01-01	135926703.5688670000
2009-04-01	45194871.6373256000
2009-07-01	109835612.8828650000
2009-10-01	154188421.5452880000
2010-01-01	181625064.8006370000
2010-04-01	169725924.7741960000
2010-07-01	109315872.3379519900
2010-10-01	187124900.4292740000
2011-01-01	184054138.3598620000
2011-04-01	34986535.2726582960
2011-07-01	253729412.3149920000
2011-10-01	44780688.4869018050
2012-01-01	68788853.1270420000
2012-04-01	12780510.7680468000
2012-07-01	98381726.2918214000
2012-10-01	148116899.2144010000
2013-01-01	126110854.1361840000
2013-04-01	-96491240.2009747900
2013-07-01	72968514.6828397000
2013-10-01	111386895.0043900000
2014-01-01	-49756502.3571939000
2014-04-01	-216516102.4268050000
2014-07-01	-136562917.3730079800
2014-10-01	78021146.3436455000
2015-01-01	-35299276.7483786000
2015-04-01	-160929979.2167130000
2015-07-01	-165810969.6573420000
2015-10-01	-182591799.2695219800
2016-01-01	-271429846.1458610000
2016-04-01	-398779593.6283830000
2016-07-01	-309874069.2546420000
2016-10-01	-250655622.6309140000
2017-01-01	-423254465.9349290000
2017-04-01	-531040240.1452330000
2017-07-01	-580385950.9479101000
2017-10-01	-529542624.3597220000
2018-01-01	-410806850.9966220000
2018-04-01	-636560702.9905120000
2018-07-01	-557427088.9227150000