Quarter	US Dollars, monthly level
1960-01-01	-132659896.22300500
1960-04-01	-162491669.78994900
1960-07-01	-142103505.96790400
1960-10-01	-145634813.92289500
1961-01-01	-152785252.77269900
1961-04-01	-233829689.85429800
1961-07-01	-146550943.83425000
1961-10-01	-151275447.26049700
1962-01-01	-174578767.91053300
1962-04-01	-184538238.39839800
1962-07-01	-146373682.96474900
1962-10-01	-187195090.95730200
1963-01-01	-181676688.27749800
1963-04-01	-221852390.47801800
1963-07-01	-158007851.91890600
1963-10-01	-187071701.50566600
1964-01-01	-154636799.08813700
1964-04-01	-162824226.30593398
1964-07-01	-155830736.54368100
1964-10-01	-218396711.20438200
1965-01-01	-183954918.93119500
1965-04-01	-207468202.89015400
1965-07-01	-189861914.37197500
1965-10-01	-185211109.86846000
1966-01-01	-184672379.07534500
1966-04-01	-181505024.57324400
1966-07-01	-172698288.40166200
1966-10-01	-300555355.77888596
1967-01-01	-274720025.57663400
1967-04-01	-257586632.91979100
1967-07-01	-240065210.49280000
1967-10-01	-236514412.55334398
1968-01-01	-213655169.51705200
1968-04-01	-221059911.57581300
1968-07-01	-185902227.74779200
1968-10-01	-147829385.85139298
1969-01-01	-104522742.44272800
1969-04-01	-156734542.94999000
1969-07-01	-182665147.49154500
1969-10-01	-294104752.78264000
1970-01-01	-225120500.33100100
1970-04-01	-305283417.83129096
1970-07-01	-238794952.31320400
1970-10-01	-477233167.89412600
1971-01-01	-299139553.64500100
1971-04-01	-438964748.20257396
1971-07-01	-383244901.96205900
1971-10-01	-399875066.53569200
1972-01-01	-256323780.78319502
1972-04-01	-317235122.37327400
1972-07-01	-194505785.43754700
1972-10-01	-321183239.66136295
1973-01-01	-326624261.54140700
1973-04-01	-299418764.30996600
1973-07-01	-533446047.20066200
1973-10-01	-412742656.63321304
1974-01-01	-496998960.61966200
1974-04-01	-579588146.92462100
1974-07-01	-427977015.13469200
1974-10-01	-639899263.84992600
1975-01-01	-699724045.13874200
1975-04-01	-1212589217.50629000
1975-07-01	-203113218.84231502
1975-10-01	-366820060.43741200
1976-01-01	-816273774.33481100
1976-04-01	-696267511.09424700
1976-07-01	-561626537.92654200
1976-10-01	-1091170160.97182000
1977-01-01	-1163263267.41283000
1977-04-01	-954221631.59689590
1977-07-01	-1058800578.90099000
1977-10-01	-832801444.01096900
1978-01-01	-575036867.63428300
1978-04-01	169468465.23653800
1978-07-01	65050674.34618010
1978-10-01	-264423849.26073098
1979-01-01	33617892.81140920
1979-04-01	-72862159.84487450
1979-07-01	66555454.41393360
1979-10-01	-189326779.81133800
1980-01-01	561724227.73618200
1980-04-01	392568260.53032000
1980-07-01	126416873.34389400
1980-10-01	545753221.81073310
1981-01-01	572059488.12165500
1981-04-01	1244363466.17633000
1981-07-01	320525516.42189100
1981-10-01	430035987.28158200
1982-01-01	694937743.82568990
1982-04-01	458034854.94170696
1982-07-01	397645975.25097500
1982-10-01	550586047.87687210
1983-01-01	797525188.90485700
1983-04-01	1039939670.70697990
1983-07-01	1196727123.52085020
1983-10-01	1466644630.18577000
1984-01-01	1253818035.52857000
1984-04-01	1150135622.69059010
1984-07-01	1197230942.03030000
1984-10-01	1398797194.93781000
1985-01-01	1165098530.83094000
1985-04-01	1156758077.51414000
1985-07-01	1080016925.97094000
1985-10-01	1024337361.14832000
1986-01-01	397929639.93710100
1986-04-01	-1407533767.98502000
1986-07-01	-834120531.59277400
1986-10-01	-341881558.93122500
1987-01-01	157214448.00671500
1987-04-01	-154862105.05901802
1987-07-01	-604540500.37398400
1987-10-01	-539557954.15884300
1988-01-01	-142968884.84570400
1988-04-01	-378369765.39034800
1988-07-01	173631488.17142600
1988-10-01	-430327778.30967900
1989-01-01	1041261346.84675000
1989-04-01	1139335623.12271000
1989-07-01	1121682867.82340000
1989-10-01	129602847.28930598
1990-01-01	1150276209.48971000
1990-04-01	432908203.93334900
1990-07-01	2068505435.01152010
1990-10-01	3162438253.70797000
1991-01-01	2534341642.49748000
1991-04-01	2118525302.11429000
1991-07-01	2362008351.71410000
1991-10-01	1499219746.22404000
1992-01-01	2476728648.03164000
1992-04-01	2181787290.18724000
1992-07-01	2147530262.75026000
1992-10-01	2265208099.29215000
1993-01-01	1918588107.24610000
1993-04-01	2867455110.28723000
1993-07-01	1610445578.66466000
1993-10-01	1498275826.87540980
1994-01-01	1447899433.50014000
1994-04-01	1794834652.42382980
1994-07-01	1513099044.55142000
1994-10-01	2591786679.60507000
1995-01-01	2569800744.31933000
1995-04-01	2025774829.32451000
1995-07-01	2302497182.37988000
1995-10-01	2123229354.45343000
1996-01-01	3424993607.89640000
1996-04-01	3173290699.39327000
1996-07-01	3527715555.89257000
1996-10-01	3880024983.88718000
1997-01-01	4055293567.37064030
1997-04-01	2758801650.63818000
1997-07-01	2993472962.65868000
1997-10-01	3012695911.61876000
1998-01-01	1789747139.03536000
1998-04-01	1083190978.52163000
1998-07-01	165397814.81355300
1998-10-01	-118660095.87616000
1999-01-01	962453455.60080800
1999-04-01	2206285016.87405000
1999-07-01	3244224586.96537000
1999-10-01	4878371823.45278000
2000-01-01	5657065168.66264000
2000-04-01	5492027029.00764000
2000-07-01	6792712711.36442000
2000-10-01	7735469420.37009000
2001-01-01	6921214720.81368900
2001-04-01	6500590376.00935000
2001-07-01	6782823554.55536100
2001-10-01	6068884135.69015000
2002-01-01	5518243909.23542000
2002-04-01	5691888463.22759100
2002-07-01	6412323393.75475000
2002-10-01	7171936371.32208100
2003-01-01	7556239423.14429000
2003-04-01	6529417395.11955900
2003-07-01	6105760351.47068000
2003-10-01	8073686325.92394100
2004-01-01	8402025254.28201100
2004-04-01	7763506911.20276900
2004-07-01	8265888236.44553000
2004-10-01	9603967395.79698000
2005-01-01	11510968282.96390000
2005-04-01	11099843087.94260000
2005-07-01	12239141783.98250000
2005-10-01	13386842000.10680000
2006-01-01	16107885759.74770000
2006-04-01	14515516100.07490000
2006-07-01	14106441176.47060000
2006-10-01	13065593934.15170000
2007-01-01	13215339583.70900000
2007-04-01	12241938293.91590100
2007-07-01	13194938416.47090000
2007-10-01	17395949725.06150000
2008-01-01	22093481447.73650000
2008-04-01	23897826271.97979700
2008-07-01	20295025827.18230000
2008-10-01	14759892887.88169900
2009-01-01	14025028735.34080100
2009-04-01	9373561810.09948000
2009-07-01	11116739632.19560000
2009-10-01	13328888837.43039900
2010-01-01	16125624732.93900000
2010-04-01	11002111605.98300000
2010-07-01	10653364815.25710100
2010-10-01	15572733648.02880000
2011-01-01	16489879191.97239900
2011-04-01	17155113428.55910100
2011-07-01	17793809008.86830000
2011-10-01	18140020245.92650000
2012-01-01	23890071575.74150000
2012-04-01	17384586300.65130000
2012-07-01	14500436582.30360000
2012-10-01	17865233416.28840300
2013-01-01	19065077367.34000000
2013-04-01	14731645431.89630100
2013-07-01	14372490514.93890000
2013-10-01	18077943377.52110000
2014-01-01	19530843496.50480000
2014-04-01	12980076981.85750000
2014-07-01	9667893065.96381000
2014-10-01	13001604796.88880200
2015-01-01	9159261993.97629000
2015-04-01	5035369563.27493000
2015-07-01	7385577447.08336000
2015-10-01	5747094332.10964000
2016-01-01	4544069602.92214000
2016-04-01	3207448558.16673000
2016-07-01	512138356.02647394
2016-10-01	6267069890.99096000
2017-01-01	7949744149.83193000
2017-04-01	4021246860.36941960
2017-07-01	4604073845.28679100
2017-10-01	4667589327.58768000
2018-01-01	8129255708.59213000
2018-04-01	6961411501.44492100
2018-07-01	9203024709.50597000