Quarter	US Dollars, monthly level
1960-01-01	2747101396.9009104
1960-04-01	2693949389.6710700
1960-07-01	2470282001.6609100
1960-10-01	2723759795.1946400
1961-01-01	2815502423.4152500
1961-04-01	2796756648.8998500
1961-07-01	2635205899.0088900
1961-10-01	2832856594.1709700
1962-01-01	2813365312.0423203
1962-04-01	2960542630.0700502
1962-07-01	2689002277.9018497
1962-10-01	2939682424.6247897
1963-01-01	3018758063.6862800
1963-04-01	3094552468.3950596
1963-07-01	2928694848.1419900
1963-10-01	3211836119.7029500
1964-01-01	3257065974.7191900
1964-04-01	3290328638.5435200
1964-07-01	2965684714.3919000
1964-10-01	3332928638.2631800
1965-01-01	3281813149.5330000
1965-04-01	3496876784.9517903
1965-07-01	3334760024.7299400
1965-10-01	3678410649.9749600
1966-01-01	3722433127.9355097
1966-04-01	3506834758.5907400
1966-07-01	3503025868.7502600
1966-10-01	4004941381.3315400
1967-01-01	3880493502.2921996
1967-04-01	3900135579.3378897
1967-07-01	3440132757.7381000
1967-10-01	3190073144.6159200
1968-01-01	3789647320.3417196
1968-04-01	3755353262.0520296
1968-07-01	3768345234.1435100
1968-10-01	4103478345.2049100
1969-01-01	3991463685.2724400
1969-04-01	4442818854.0922600
1969-07-01	4386687506.0575490
1969-10-01	4751076745.0896900
1970-01-01	4684807032.1814600
1970-04-01	4956759064.7727500
1970-07-01	4374873379.6149200
1970-10-01	5323803968.4911800
1971-01-01	4849827899.5049500
1971-04-01	5691044168.4992300
1971-07-01	5512512353.7435410
1971-10-01	6092864110.4836600
1972-01-01	5927955922.2038800
1972-04-01	6461680579.3228000
1972-07-01	4884431928.5079590
1972-10-01	6645539006.4111100
1973-01-01	6635460636.6792100
1973-04-01	7553092681.2977200
1973-07-01	7276269599.5921900
1973-10-01	7997519121.7617700
1974-01-01	8080930436.9056200
1974-04-01	9803152040.5939390
1974-07-01	9735060973.0331800
1974-10-01	10293643096.4458000
1975-01-01	10774225485.4797000
1975-04-01	11280387170.1121000
1975-07-01	9948314950.7234690
1975-10-01	11041726129.9510000
1976-01-01	11247219349.7518000
1976-04-01	11240911209.2424000
1976-07-01	10835475889.1928000
1976-10-01	11792222041.9688010
1977-01-01	12860155313.6372010
1977-04-01	13817862865.4050000
1977-07-01	14262836413.7642000
1977-10-01	14792216769.6334000
1978-01-01	15953994818.2416000
1978-04-01	16852686670.9217000
1978-07-01	16499687475.2870000
1978-10-01	18402161217.7245030
1979-01-01	17011398044.6332990
1979-04-01	22280555994.2896000
1979-07-01	22331030640.6612000
1979-10-01	24261694860.4222000
1980-01-01	26768637259.8972000
1980-04-01	27021710825.8877000
1980-07-01	27062605059.1564980
1980-10-01	28566015954.5458000
1981-01-01	26833047693.0929000
1981-04-01	25251507908.1788020
1981-07-01	22977465365.3275000
1981-10-01	26489873729.1498000
1982-01-01	24420396420.0154000
1982-04-01	24491752136.3239000
1982-07-01	23130197337.5165980
1982-10-01	24562831698.3530000
1983-01-01	22365752148.5920030
1983-04-01	22814811734.2240030
1983-07-01	22263762527.3997000
1983-10-01	24338919792.9720000
1984-01-01	24177684537.1218000
1984-04-01	23534147320.2200000
1984-07-01	21556897827.0304000
1984-10-01	24384123910.1095000
1985-01-01	22314436330.3821000
1985-04-01	25404859879.5804000
1985-07-01	24697644378.9955000
1985-10-01	28782770795.3456000
1986-01-01	25248932806.0921000
1986-04-01	27679360541.3759000
1986-07-01	24896043114.3062970
1986-10-01	28836661173.9306000
1987-01-01	29906395020.4291000
1987-04-01	31577569056.8382000
1987-07-01	31210532841.0634000
1987-10-01	38260290910.0709000
1988-01-01	34671354193.3661000
1988-04-01	37795067397.1189000
1988-07-01	34489424988.2320000
1988-10-01	39186512401.3452000
1989-01-01	37736289521.0123100
1989-04-01	37468065509.1652000
1989-07-01	35653352114.6821000
1989-10-01	42339687103.3275000
1990-01-01	41802662249.6062000
1990-04-01	43779790538.9791000
1990-07-01	44946637534.1543000
1990-10-01	54795772215.2112050
1991-01-01	46054453669.9357000
1991-04-01	45275460214.9967960
1991-07-01	42800417008.8053000
1991-10-01	50979953917.3051000
1992-01-01	45517192616.3357000
1992-04-01	49042226379.0007000
1992-07-01	48071519681.0370000
1992-10-01	47853514427.2635960
1993-01-01	43389831642.6516000
1993-04-01	45020144666.8083950
1993-07-01	42914501259.0738000
1993-10-01	47562710500.6008000
1994-01-01	47394035679.9064000
1994-04-01	50085378349.1741000
1994-07-01	51322465631.3069000
1994-10-01	58510606390.3277050
1995-01-01	60281710522.3158950
1995-04-01	60503941947.0712000
1995-07-01	58767120695.1294000
1995-10-01	64951535308.8770000
1996-01-01	64446590245.8456000
1996-04-01	64111944652.7975000
1996-07-01	63547545337.0077000
1996-10-01	72913611515.5839000
1997-01-01	69198177622.1509000
1997-04-01	71174081122.5577000
1997-07-01	68321758140.4638000
1997-10-01	74895348094.4946000
1998-01-01	67965705561.3779000
1998-04-01	67745675547.7610900
1998-07-01	64773087860.8574000
1998-10-01	68949279650.8887000
1999-01-01	63339871254.9123000
1999-04-01	63969325383.7030000
1999-07-01	67271534616.2657900
1999-10-01	72463126263.4040000
2000-01-01	71506915838.9688900
2000-04-01	70419742174.5822000
2000-07-01	67226776434.4338000
2000-10-01	72698640887.9758000
2001-01-01	71985239762.1315900
2001-04-01	67707460253.3697050
2001-07-01	64259674916.4305000
2001-10-01	67123273737.8748900
2002-01-01	64904918679.4683900
2002-04-01	71909976989.2545000
2002-07-01	70900279675.0551000
2002-10-01	70991434762.4417000
2003-01-01	72541165264.8031000
2003-04-01	75379259427.9050900
2003-07-01	75125214626.7132000
2003-10-01	82161543795.9829900
2004-01-01	82315776880.6320000
2004-04-01	83558907307.2102000
2004-07-01	85147364137.7691000
2004-10-01	94656523547.0281000
2005-01-01	88963844877.2741000
2005-04-01	96692241493.7131000
2005-07-01	94364821383.6505900
2005-10-01	100794763782.5810000
2006-01-01	114276908835.1100000
2006-04-01	129175630981.9030000
2006-07-01	101802348485.7200000
2006-10-01	105646102659.0400000
2007-01-01	103984710481.6850000
2007-04-01	110253209187.3020000
2007-07-01	108988961392.2789900
2007-10-01	119193781073.9890000
2008-01-01	116898470914.7310000
2008-04-01	128591850942.7430100
2008-07-01	121021576358.1950000
2008-10-01	95375302581.1574000
2009-01-01	77849706309.9359000
2009-04-01	84181722460.9520000
2009-07-01	91155272293.3860000
2009-10-01	100612213337.8089900
2010-01-01	95575159557.3288000
2010-04-01	98209222120.9522100
2010-07-01	100903533278.5540000
2010-10-01	111626874242.3280000
2011-01-01	116621926137.2500000
2011-04-01	119522431330.5600000
2011-07-01	116610992998.1960000
2011-10-01	121483937537.1340000
2012-01-01	119779600941.7080000
2012-04-01	114621561886.0510000
2012-07-01	115480806687.3190000
2012-10-01	119359166074.6330000
2013-01-01	114841721990.6470000
2013-04-01	119014438858.4810000
2013-07-01	114246388744.1540000
2013-10-01	122029327487.9800000
2014-01-01	120020709951.6050000
2014-04-01	120909139598.6610000
2014-07-01	115995630076.7139900
2014-10-01	117271227730.7990000
2015-01-01	105029853347.0510000
2015-04-01	112261175090.5309900
2015-07-01	103920362860.3220000
2015-10-01	106033711235.9610000
2016-01-01	97364739221.9236000
2016-04-01	104487438599.7280000
2016-07-01	94783078009.1204000
2016-10-01	100585319988.3490000
2017-01-01	100780169597.8100000
2017-04-01	103757094149.0820000
2017-07-01	104943360261.2090000
2017-10-01	113246076931.2230000
2018-01-01	116501729047.2760000
2018-04-01	112270042796.8110000
2018-07-01	109916457458.2970000