Quarter	US Dollars, sum over component sub-periods
1960-01-01	266300645.617945970
1960-04-01	-39286761.932703100
1960-07-01	-146137274.273456000
1960-10-01	-61839747.672117700
1961-01-01	-98052323.203515990
1961-04-01	-44703402.979418100
1961-07-01	98015097.200118200
1961-10-01	-19692151.101486400
1962-01-01	320723645.572824000
1962-04-01	120895852.889850000
1962-07-01	182257714.352054980
1962-10-01	-75663894.628092700
1963-01-01	243855108.208641020
1963-04-01	-16802999.828389500
1963-07-01	-33598793.668933000
1963-10-01	-109112899.536947000
1964-01-01	-11192666.579791000
1964-04-01	-173469707.134097000
1964-07-01	-571396021.099943000
1964-10-01	-337194285.309235000
1965-01-01	-150823753.255133000
1965-04-01	162125382.515750000
1965-07-01	-371459868.751324000
1965-10-01	224293332.315546000
1966-01-01	-131643609.490571000
1966-04-01	-178692216.998254000
1966-07-01	-122717466.739659000
1966-10-01	371189689.001460000
1967-01-01	424647237.111889000
1967-04-01	176135155.195905000
1967-07-01	-428972019.993253000
1967-10-01	-624484139.239657000
1968-01-01	-957637862.537146000
1968-04-01	-387495049.969700000
1968-07-01	-234177446.383046000
1968-10-01	-71613932.726089100
1969-01-01	482799799.056906000
1969-04-01	284397764.194179000
1969-07-01	0.000000000
1969-10-01	1132691179.650920200
1970-01-01	1427796499.289780100
1970-04-01	21624251.857951900
1970-07-01	-117013534.716775000
1970-10-01	630827759.282617000
1971-01-01	1074252571.070040000
1971-04-01	522424794.048378000
1971-07-01	407520833.587947000
1971-10-01	1256621932.400490000
1972-01-01	400221487.075580000
1972-04-01	-540639404.866911900
1972-07-01	-129567013.118579020
1972-10-01	-874724095.472113000
1973-01-01	-277988332.684192960
1973-04-01	-827424223.378343900
1973-07-01	-86740271.112304700
1973-10-01	-1317070628.256840000
1974-01-01	-1942706752.890400000
1974-04-01	-2409432086.279510000
1974-07-01	-1154290011.533280000
1974-10-01	-1950153750.956340000
1975-01-01	-923983789.690104000
1975-04-01	-1503277136.779100000
1975-07-01	-979919673.947066100
1975-10-01	-155258313.760643000
1976-01-01	-23981277.931240603
1976-04-01	-324986189.794993000
1976-07-01	-443165137.394066000
1976-10-01	-105597063.199385000
1977-01-01	520917683.590366000
1977-04-01	1708752884.823660000
1977-07-01	2429193549.789520300
1977-10-01	1066171054.246679900
1978-01-01	464866733.308696000
1978-04-01	1292124963.660300000
1978-07-01	831835922.546342000
1978-10-01	2536519473.808560400
1979-01-01	1364378210.664220000
1979-04-01	-904952554.389913000
1979-07-01	-631399907.214219000
1979-10-01	-1776456838.979310000
1980-01-01	1788781180.302850000
1980-04-01	-207736393.102626000
1980-07-01	390589389.219543040
1980-10-01	3077771701.441920000
1981-01-01	8413283298.856850000
1981-04-01	4420104370.206830000
1981-07-01	288274097.998755000
1981-10-01	-1170885549.995110000
1982-01-01	-370928714.609165970
1982-04-01	-2101784571.501129900
1982-07-01	2111055218.933730000
1982-10-01	2291849939.120540000
1983-01-01	2691365421.894130000
1983-04-01	-287555536.914527000
1983-07-01	-1236456330.775100000
1983-10-01	3723200890.757079600
1984-01-01	1228109302.384070000
1984-04-01	2591940269.779750000
1984-07-01	1617610518.131360000
1984-10-01	3856077045.629230000
1985-01-01	1820540691.224500000
1985-04-01	23867303.090982400
1985-07-01	6135232487.112150000
1985-10-01	-6404310128.565180000
1986-01-01	515548847.577765940
1986-04-01	1423475503.980110000
1986-07-01	-5401311679.429510000
1986-10-01	3501982704.302100000
1987-01-01	-7039519520.738191000
1987-04-01	-4683510684.388290000
1987-07-01	1564409353.996910000
1987-10-01	-5674485198.851581000
1988-01-01	-10333331641.425400000
1988-04-01	-4728064284.339620000
1988-07-01	-3221996014.675370000
1988-10-01	-9038358521.520160000
1989-01-01	-14886985431.814999000
1989-04-01	810462728.730046000
1989-07-01	-3811110333.476320300
1989-10-01	670448382.611745000
1990-01-01	-11434013958.958900000
1990-04-01	-14300873726.704300000
1990-07-01	-10560346634.096500000
1990-10-01	-3839788936.912560000
1991-01-01	7996544219.111560000
1991-04-01	-935415178.623822100
1991-07-01	32013539.216097202
1991-10-01	-16641952375.260601000
1992-01-01	4519688579.064630500
1992-04-01	-9343182597.082110000
1992-07-01	-4577877853.038720000
1992-10-01	-20015311517.621403000
1993-01-01	12239104147.755402000
1993-04-01	-12924920562.184300000
1993-07-01	-20431322073.077000000
1993-10-01	-14886004999.058899000
1994-01-01	6467559203.178180000
1994-04-01	515739560.905635000
1994-07-01	-2128095468.029289700
1994-10-01	-90264819.861661800
1995-01-01	1359321398.085510000
1995-04-01	7533869017.569320000
1995-07-01	-4584590856.585750000
1995-10-01	-6185711889.205211000
1996-01-01	15851312984.382400000
1996-04-01	-16550033166.280100000
1996-07-01	2557135814.074800000
1996-10-01	-5185782755.570340000
1997-01-01	16527956993.579300000
1997-04-01	-10950110447.748901000
1997-07-01	-2022363026.269080000
1997-10-01	7215968752.311009000
1998-01-01	9765140260.678190000
1998-04-01	-4726826837.438319000
1998-07-01	-6474664716.778220000
1998-10-01	2364444504.627520000
1999-01-01	-16732951005.372300000
1999-04-01	8786845172.007330000
1999-07-01	-23808850196.108800000
1999-10-01	-2676755378.383150000
2000-01-01	-12313428231.445799000
2000-04-01	-4069105067.087770000
2000-07-01	1864539914.723739900
2000-10-01	-23174113007.941600000
2001-01-01	-8690538201.192200000
2001-04-01	-3598193883.619840000
2001-07-01	-10057260147.282501000
2001-10-01	2015848257.880159900
2002-01-01	-12017950265.749600000
2002-04-01	-11726106206.225200000
2002-07-01	13818245469.170301000
2002-10-01	-15661493190.341600000
2003-01-01	6172658979.489510000
2003-04-01	-33920019321.279003000
2003-07-01	-1939868075.798000000
2003-10-01	-35498426791.122300000
2004-01-01	-8814816429.036840000
2004-04-01	-37296144411.418396000
2004-07-01	-5584000069.767850000
2004-10-01	-5299929861.709560000
2005-01-01	10585083315.190100000
2005-04-01	-35040223437.042100000
2005-07-01	-40496615098.955000000
2005-10-01	-7217860474.178491000
2006-01-01	-12293719820.387700000
2006-04-01	-16788340041.949799000
2006-07-01	-19284979260.772000000
2006-10-01	-26434042701.278900000
2007-01-01	-33018591531.723100000
2007-04-01	13121551888.687900000
2007-07-01	-52375177900.942696000
2007-10-01	-56979683947.745500000
2008-01-01	-15127316044.666900000
2008-04-01	-9821181920.907509000
2008-07-01	-53590553546.254700000
2008-10-01	-54776630823.236000000
2009-01-01	-9230668935.349070000
2009-04-01	-18262896293.140900000
2009-07-01	-30468216226.498302000
2009-10-01	-39466209156.775800000
2010-01-01	-42611378843.414800000
2010-04-01	-2007465762.195350000
2010-07-01	-18686700316.938602000
2010-10-01	-46071667836.406600000
2011-01-01	-1364804761.739730100
2011-04-01	958893052.752955000
2011-07-01	-4230423091.464629700
2011-10-01	-37913637332.583400000
2012-01-01	-15282923782.654600000
2012-04-01	-19924145383.104100000
2012-07-01	-25235203990.172000000
2012-10-01	-32578779405.694100000
2013-01-01	-25032228636.209300000
2013-04-01	-24321283201.252600000
2013-07-01	-53514319903.426100000
2013-10-01	-29427440646.679398000
2014-01-01	-67477508350.580800000
2014-04-01	-15827768893.863400000
2014-07-01	-34961541428.081900000
2014-10-01	-35678721500.038090000
2015-01-01	-18234118105.668900000
2015-04-01	-25271212325.053800000
2015-07-01	-46623010485.280500000
2015-10-01	-52611926833.439000000
2016-01-01	-32258384307.895603000
2016-04-01	-56576447111.786400000
2016-07-01	-43660206004.893590000
2016-10-01	-15455862673.708399000
2017-01-01	-23840682452.300102000
2017-04-01	-24997000792.678300000
2017-07-01	-26525244065.223600000
2017-10-01	-9500117981.043470000
2018-01-01	-4730875253.463250000
2018-04-01	-19582816630.257700000