Quarter	US Dollars, sum over component sub-periods
1960-01-01	22335316.1027862020
1960-04-01	-51426416.9495806000
1960-07-01	-19034892.7201544000
1960-10-01	-6719194.5926143200
1961-01-01	80356658.5651142000
1961-04-01	-106863843.9168270000
1961-07-01	20085330.7424546030
1961-10-01	48197225.3779888000
1962-01-01	100006292.5307810000
1962-04-01	-22439981.4645741000
1962-07-01	-42521986.4780099000
1962-10-01	19017333.3671489020
1963-01-01	39299878.2826802950
1963-04-01	18090256.8138268030
1963-07-01	-5605869.2703836495
1963-10-01	117249963.5222700000
1964-01-01	-53616008.8466743000
1964-04-01	-18000652.5236702000
1964-07-01	-56698333.7360372000
1964-10-01	56781533.6061759000
1965-01-01	-5576666.3357876700
1965-04-01	44779745.2256768000
1965-07-01	-58484443.1381778050
1965-10-01	-23499001.2924488970
1966-01-01	-35720394.7258064000
1966-04-01	26695192.6554894000
1966-07-01	-34446166.4980034000
1966-10-01	53372797.5756015000
1967-01-01	25601284.8551960000
1967-04-01	77968219.4862596000
1967-07-01	-33291989.9840751030
1967-10-01	-77934671.8186146000
1968-01-01	-43614849.9055395000
1968-04-01	-7782294.5927955300
1968-07-01	0.0000000000
1968-10-01	43262657.6933235000
1969-01-01	1110899.1145433400
1969-04-01	34434755.3973062000
1969-07-01	8874387.9418470200
1969-10-01	115755270.2673859900
1970-01-01	15641719.1240518000
1970-04-01	-37968851.5233204000
1970-07-01	-32188039.5972199960
1970-10-01	46647982.4223344000
1971-01-01	2244119.9540997697
1971-04-01	-4496399.8787673700
1971-07-01	-34034446.0740531000
1971-10-01	-2327428.7423157700
1972-01-01	13101000.0399700000
1972-04-01	27393000.0835737000
1972-07-01	-80990266.7216828000
1972-10-01	-14355388.6202302000
1973-01-01	60726523.7428098000
1973-04-01	4265356.8037556000
1973-07-01	-223531693.5002360000
1973-10-01	-168600859.4888940200
1974-01-01	-138733123.5625920000
1974-04-01	120877817.0056610000
1974-07-01	-134741152.9334400000
1974-10-01	-296127952.5377330000
1975-01-01	-27093375.4744274020
1975-04-01	-47269052.9340627000
1975-07-01	-34995144.2036550050
1975-10-01	104000476.3542440000
1976-01-01	-172984403.2473729800
1976-04-01	-40924272.8141239060
1976-07-01	-262608693.2579750000
1976-10-01	-483950815.6648010000
1977-01-01	-305495561.2761760000
1977-04-01	-127398218.5036780000
1977-07-01	-20021878.8753101000
1977-10-01	-80090010.1735372000
1978-01-01	-117436669.5572889900
1978-04-01	205896934.3601050000
1978-07-01	-154542767.8291110000
1978-10-01	-57667637.6845307050
1979-01-01	-73549414.7961237000
1979-04-01	-164147429.8671800000
1979-07-01	-184961966.4096760000
1979-10-01	537290974.1407750000
1980-01-01	620470518.8642269000
1980-04-01	-488214253.9678610000
1980-07-01	-254792065.6170210000
1980-10-01	-418713602.8949320300
1981-01-01	-1095697930.9524400000
1981-04-01	-958507188.0254760000
1981-07-01	-333843199.3066349600
1981-10-01	-2585835587.5880704000
1982-01-01	-1182336597.6298100000
1982-04-01	-3084016794.2118600000
1982-07-01	-1527933110.3036500000
1982-10-01	-1949227618.0025300000
1983-01-01	-1066870376.8855500000
1983-04-01	-783860627.9633371000
1983-07-01	-585016773.8640419000
1983-10-01	-1404580015.6523302000
1984-01-01	-418117971.8100490600
1984-04-01	-2379256065.2476900000
1984-07-01	-1225961492.8983402000
1984-10-01	-1591402568.4195800000
1985-01-01	-606963667.2090499000
1985-04-01	-541571676.9090690000
1985-07-01	-1229480945.2325702000
1985-10-01	-732071248.6568130000
1986-01-01	-2364708331.0139900000
1986-04-01	-928121439.7972760000
1986-07-01	-2190829145.4097100000
1986-10-01	-579316368.8059280000
1987-01-01	-1359511293.7129100000
1987-04-01	231687062.6508970000
1987-07-01	-1176732083.6301600000
1987-10-01	-923904976.9304490000
1988-01-01	-1143838939.5937900000
1988-04-01	-4738827727.0754700000
1988-07-01	47152498.8115179000
1988-10-01	1644388815.0378700000
1989-01-01	-1709877263.8921800000
1989-04-01	-575687687.2221141000
1989-07-01	-1075416361.0113200000
1989-10-01	-2266287579.4599900000
1990-01-01	2766408743.0069100000
1990-04-01	149035391.3423280000
1990-07-01	-1532707379.1330900000
1990-10-01	-3002761760.9722500000
1991-01-01	1793343369.8167700000
1991-04-01	9251675.0393374190
1991-07-01	-91628517.1336332000
1991-10-01	662557711.4829661000
1992-01-01	-1139590901.2019398000
1992-04-01	-2787349366.1596300000
1992-07-01	-181213588.1276610200
1992-10-01	-1059674115.8319901000
1993-01-01	56325125.7443909050
1993-04-01	1579851115.8848300000
1993-07-01	1004232425.1114299000
1993-10-01	-1490734704.4489400000
1994-01-01	3164345779.8211200000
1994-04-01	-194136566.5326280000
1994-07-01	-2920065708.2522798000
1994-10-01	2906963776.4113297000
1995-01-01	-787890521.6096809000
1995-04-01	318511794.5400750000
1995-07-01	3291120576.4312500000
1995-10-01	545442659.7276709000
1996-01-01	606692717.3736130000
1996-04-01	969564705.0141261000
1996-07-01	-272408812.4748730000
1996-10-01	2841400355.2314000000
1997-01-01	1392009184.6016300000
1997-04-01	-3857886833.8152103000
1997-07-01	257973910.1128669700
1997-10-01	908947368.4446570000
1998-01-01	-106635798.1933289900
1998-04-01	-2384239671.0165000000
1998-07-01	-3062013203.0418400000
1998-10-01	-4496683505.2210000000
1999-01-01	2509967976.2265500000
1999-04-01	-5091321891.4959600000
1999-07-01	-3660937754.1414200000
1999-10-01	-4360233375.8513500000
2000-01-01	89559902.7086034000
2000-04-01	-976167053.8048340000
2000-07-01	-677052831.2632480000
2000-10-01	2290876767.7914600000
2001-01-01	-4507564791.6978800000
2001-04-01	447642943.4748070000
2001-07-01	2894802408.1397004000
2001-10-01	-2864940007.5575700000
2002-01-01	1635456421.9626300000
2002-04-01	-6970865161.4813500000
2002-07-01	-1352608119.8568500000
2002-10-01	-2038053184.4046600000
2003-01-01	-2565830112.7981000000
2003-04-01	-4931926894.2918800000
2003-07-01	6438358355.5083800000
2003-10-01	-3104219108.7801104000
2004-01-01	3792573821.1724400000
2004-04-01	6738227321.7029900000
2004-07-01	9604539812.0234090000
2004-10-01	-13604385151.6745000000
2005-01-01	-8769029795.5756110000
2005-04-01	5621753866.0599100000
2005-07-01	-2004302746.0950400000
2005-10-01	-4687917832.1820900000
2006-01-01	643885286.5819300000
2006-04-01	2880351281.7845597000
2006-07-01	6913822095.1740500000
2006-10-01	-2326776676.2000900000
2007-01-01	2973848454.4610100000
2007-04-01	-8731073609.6556300000
2007-07-01	1826215548.0379798000
2007-10-01	-25249261819.7390980000
2008-01-01	19033234638.8328000000
2008-04-01	-2685010196.5203200000
2008-07-01	-18925796819.2212000000
2008-10-01	-1481147430.7661400000
2009-01-01	16717081743.4427990000
2009-04-01	6652456055.6449190000
2009-07-01	7428621703.8836400000
2009-10-01	-4631617161.0953800000
2010-01-01	19549086167.6905980000
2010-04-01	6839476736.2011900000
2010-07-01	6528942826.6169800000
2010-10-01	10225565499.0222000000
2011-01-01	-4887572337.7240400000
2011-04-01	-3105034317.0504600000
2011-07-01	4912386100.1924300000
2011-10-01	16033989007.8102000000
2012-01-01	483246307.2600220000
2012-04-01	-9711383515.6911500000
2012-07-01	-3372796649.7477600000
2012-10-01	-7776190722.4117910000
2013-01-01	6993704427.8130490000
2013-04-01	17005669773.3541010000
2013-07-01	12220579952.8945000000
2013-10-01	-1545144601.6895400000
2014-01-01	-1030034602.4592300000
2014-04-01	5998701531.2840200000
2014-07-01	2153049471.5323000000
2014-10-01	602074329.0059700000
2015-01-01	13525406200.3733000000
2015-04-01	10258730748.4470000000
2015-07-01	-6669477468.5474300000
2015-10-01	-4679975887.9444090000
2016-01-01	-17032130115.5496000000
2016-04-01	-11710465099.1997010000
2016-07-01	-11330060460.4739000000
2016-10-01	15163963880.5228000000
2017-01-01	-1410908955.8808100000
2017-04-01	10909965900.1737000000
2017-07-01	-1587154439.0227401000
2017-10-01	-15465641081.7435020000
2018-01-01	21764929614.1712000000
2018-04-01	8318202084.7568890000