Quarter	US Dollars, monthly level
1960-01-01	170625000.00000000
1960-04-01	241562500.00000000
1960-07-01	284375000.00000000
1960-10-01	292187500.00000000
1961-01-01	199375000.00000000
1961-04-01	242812500.00000000
1961-07-01	304687500.00000000
1961-10-01	307500000.00000000
1962-01-01	223750000.00000000
1962-04-01	270312500.00000000
1962-07-01	299687500.00000000
1962-10-01	310000000.00000000
1963-01-01	166463057.09098300
1963-04-01	320191737.73367196
1963-07-01	330132193.27151100
1963-10-01	325483824.25890600
1964-01-01	252589749.54884100
1964-04-01	323113082.27597500
1964-07-01	349726948.60149600
1964-10-01	357937782.99214303
1965-01-01	286867907.52785800
1965-04-01	354624344.30403000
1965-07-01	375833748.86937200
1965-10-01	400988927.76972200
1966-01-01	272700879.11382204
1966-04-01	387341306.14995600
1966-07-01	396359924.13355297
1966-10-01	439837607.97920100
1967-01-01	337643700.47555906
1967-04-01	390763896.42361000
1967-07-01	388274724.55791000
1967-10-01	404358755.79781300
1968-01-01	332836158.35140000
1968-04-01	431298743.88696396
1968-07-01	401594973.64681500
1968-10-01	466426811.29930204
1969-01-01	405578352.18940705
1969-04-01	479029952.45378000
1969-07-01	518171165.42197394
1969-10-01	580860065.57997400
1970-01-01	495381034.93315000
1970-04-01	579923531.78655400
1970-07-01	589660167.66012000
1970-10-01	635319167.55406500
1971-01-01	517139129.40339200
1971-04-01	546798031.90916000
1971-07-01	597511379.53050400
1971-10-01	690472933.64945290
1972-01-01	695292459.93202210
1972-04-01	692313966.33543190
1972-07-01	719726999.32625710
1972-10-01	794748784.44804690
1973-01-01	818710982.58515500
1973-04-01	834598342.76088390
1973-07-01	1007873464.43119000
1973-10-01	1179877471.84891000
1974-01-01	1182250572.79168000
1974-04-01	1402315318.02389000
1974-07-01	1371769175.07842000
1974-10-01	1548777189.17067000
1975-01-01	1467929907.28267000
1975-04-01	1329027761.63616010
1975-07-01	1195124576.36902000
1975-10-01	1524906768.72713000
1976-01-01	1305696389.00737000
1976-04-01	1520705383.69668000
1976-07-01	1580270682.11794000
1976-10-01	1949478143.25823000
1977-01-01	1840543259.41595000
1977-04-01	1687965142.20282980
1977-07-01	1957236486.90636010
1977-10-01	2195823819.70311000
1978-01-01	1908460434.77322980
1978-04-01	2040280466.92155000
1978-07-01	2017864316.52638980
1978-10-01	2623505547.12221000
1979-01-01	2446794682.48245000
1979-04-01	2728208613.44535970
1979-07-01	2673028457.02979000
1979-10-01	3347996765.47427000
1980-01-01	3401005805.02618000
1980-04-01	3359239354.48754000
1980-07-01	3532231872.17853000
1980-10-01	3894794680.80238000
1981-01-01	3619009219.93823000
1981-04-01	3603583777.37992000
1981-07-01	3104313694.51212020
1981-10-01	3713158914.11118000
1982-01-01	3583845456.24718000
1982-04-01	3394168556.11111970
1982-07-01	2799486440.46430970
1982-10-01	3329960880.05211000
1983-01-01	3123843756.49513000
1983-04-01	3143345239.44324000
1983-07-01	2870284533.75651000
1983-10-01	3381571264.69225000
1984-01-01	3424730254.54046960
1984-04-01	3434450218.32175970
1984-07-01	3177111905.87399960
1984-10-01	3447758970.88941000
1985-01-01	2969502685.32242970
1985-04-01	3504773440.76412000
1985-07-01	3436920388.64808030
1985-10-01	3716641593.10841000
1986-01-01	3804114669.62816000
1986-04-01	3572071835.16100030
1986-07-01	4271037356.78400040
1986-10-01	4681735291.35872900
1987-01-01	4483578889.77771000
1987-04-01	4945843189.19146000
1987-07-01	4778166631.72236100
1987-10-01	5286355882.60880000
1988-01-01	5149824332.23442000
1988-04-01	5657374711.80137000
1988-07-01	4977019972.18914000
1988-10-01	6443833625.91783000
1989-01-01	5917643863.88097000
1989-04-01	5513599376.10962000
1989-07-01	5282704927.59013900
1989-10-01	6583274813.07794000
1990-01-01	6204569358.22621900
1990-04-01	6793920439.37055000
1990-07-01	6221062322.72218000
1990-10-01	7343833611.21853000
1991-01-01	6047026893.24861000
1991-04-01	5330581910.70102000
1991-07-01	5511042175.06220000
1991-10-01	6141392867.93742000
1992-01-01	5696986402.98147000
1992-04-01	6114689874.78609000
1992-07-01	6039228316.88688900
1992-10-01	6090809371.77100900
1993-01-01	5435489599.69156900
1993-04-01	5947477819.49831000
1993-07-01	5605946738.62461000
1993-10-01	6436889262.94465000
1994-01-01	6231059978.45025900
1994-04-01	7172652863.23080000
1994-07-01	7426433990.01016000
1994-10-01	8925508981.27729000
1995-01-01	9399803815.07144000
1995-04-01	11365901636.35210000
1995-07-01	9903141206.16183000
1995-10-01	11585115191.06470000
1996-01-01	9939578542.89901000
1996-04-01	10610287951.92520000
1996-07-01	9854595663.74582100
1996-10-01	11526289765.23799900
1997-01-01	9917417176.90801000
1997-04-01	10632327028.74380100
1997-07-01	10147035900.59000000
1997-10-01	11213836631.19570200
1998-01-01	10626716514.08450000
1998-04-01	11008733093.95570000
1998-07-01	10383371083.00860000
1998-10-01	11455237020.80110000
1999-01-01	10140283633.83800000
1999-04-01	10205326532.24990000
1999-07-01	10095334081.76130000
1999-10-01	11757418904.96480000
2000-01-01	11006511217.91520100
2000-04-01	11381257988.52840000
2000-07-01	11299642764.75299800
2000-10-01	12196046793.04800000
2001-01-01	11317798951.90700000
2001-04-01	10615052338.45680000
2001-07-01	9852099923.64318000
2001-10-01	11497387263.59930000
2002-01-01	9756062127.78089000
2002-04-01	11260646950.63690000
2002-07-01	11195850992.72210000
2002-10-01	12982209864.35389900
2003-01-01	12030338051.41860000
2003-04-01	13593648891.21049900
2003-07-01	12498288565.71480000
2003-10-01	15143327657.49760000
2004-01-01	14580420945.57090000
2004-04-01	14411352518.75619900
2004-07-01	14631027587.15830000
2004-10-01	17987101291.40720000
2005-01-01	16284953912.06010000
2005-04-01	16031591482.44310200
2005-07-01	15764781562.27440000
2005-10-01	17349890264.97229800
2006-01-01	16925735555.18900000
2006-04-01	20059565492.09040000
2006-07-01	19228226621.20400200
2006-10-01	21112690680.56310300
2007-01-01	20570636294.74440000
2007-04-01	23368725228.73830000
2007-07-01	21993735773.65420000
2007-10-01	24175856154.05340000
2008-01-01	24644661437.88440000
2008-04-01	28275593165.68969700
2008-07-01	24373916328.77010000
2008-10-01	19458766851.65020000
2009-01-01	14143006742.21410000
2009-04-01	15354765963.65050000
2009-07-01	14930158190.97399900
2009-10-01	18447112703.52080000
2010-01-01	14435795202.96070000
2010-04-01	16981170295.85930000
2010-07-01	16946119954.33459900
2010-10-01	21124918385.18290300
2011-01-01	19311999401.69980200
2011-04-01	20927282425.82720000
2011-07-01	19864564263.52680000
2011-10-01	19046221585.33400000
2012-01-01	18731190141.37270000
2012-04-01	18489931090.55859800
2012-07-01	17693893719.61820000
2012-10-01	18226107451.88490000
2013-01-01	18261258767.65230000
2013-04-01	18490173455.52880000
2013-07-01	18005803457.56820000
2013-10-01	19677375197.02760000
2014-01-01	18164204459.00520300
2014-04-01	20004617084.44769700
2014-07-01	18296540087.01970000
2014-10-01	17872967986.38980000
2015-01-01	14623881150.10680000
2015-04-01	15626829157.99880000
2015-07-01	14530460037.78550100
2015-10-01	15050776670.34760000
2016-01-01	13469288710.59780000
2016-04-01	15544611459.06640000
2016-07-01	14084279559.23720000
2016-10-01	14796450000.64620000
2017-01-01	15567382119.43150000
2017-04-01	17012560863.76740000
2017-07-01	17222003776.34959800
2017-10-01	18284442135.76580000
2018-01-01	19189854850.72370000
2018-04-01	19753638540.99080000