Quarter	US Dollars, monthly level
1960-01-01	-38655462.185271000
1960-04-01	-174143835.617627000
1960-07-01	98527397.261253490
1960-10-01	9394145.677360270
1961-01-01	-16060606.060717800
1961-04-01	-62273641.851525200
1961-07-01	165600775.195087020
1961-10-01	39466066.259473406
1962-01-01	-71110404.072623800
1962-04-01	-55429101.987004206
1962-07-01	54728275.657727400
1962-10-01	153184927.372148000
1963-01-01	66803159.542522500
1963-04-01	46861225.815780000
1963-07-01	105917178.008943000
1963-10-01	171534008.549729000
1964-01-01	119393591.618672000
1964-04-01	96291408.697944400
1964-07-01	373267831.488743960
1964-10-01	167101892.458371000
1965-01-01	9377176.015524560
1965-04-01	-57013281.503393100
1965-07-01	88828647.471209900
1965-10-01	82940481.836520790
1966-01-01	29835024.398018700
1966-04-01	-76979506.180514710
1966-07-01	252416473.236875000
1966-10-01	46964271.406827800
1967-01-01	132306544.085918000
1967-04-01	32169301.735345602
1967-07-01	96705869.239236400
1967-10-01	246286960.078326020
1968-01-01	206267096.898103000
1968-04-01	297121830.754201000
1968-07-01	432402952.952641960
1968-10-01	289230601.976672000
1969-01-01	187869727.975501000
1969-04-01	59037963.095027700
1969-07-01	180193117.339158000
1969-10-01	260786050.820720970
1970-01-01	554466773.743139000
1970-04-01	547162913.409959100
1970-07-01	686381231.677359900
1970-10-01	971566383.264837000
1971-01-01	643567415.736947000
1971-04-01	521674127.720520000
1971-07-01	578275352.810437900
1971-10-01	436210176.256518000
1972-01-01	213569292.125435980
1972-04-01	356975708.504440960
1972-07-01	182977619.533367000
1972-10-01	741940343.789192100
1973-01-01	371123027.704510000
1973-04-01	600917786.045192000
1973-07-01	451285665.288080000
1973-10-01	672024623.373744000
1974-01-01	228100848.083803000
1974-04-01	339713879.301115040
1974-07-01	209050114.007004000
1974-10-01	-36445837.774993700
1975-01-01	-568855856.453991900
1975-04-01	-490553333.788493000
1975-07-01	-330805275.911039000
1975-10-01	22297928.715024702
1976-01-01	-299254402.427095000
1976-04-01	116413164.439967000
1976-07-01	694531455.994491000
1976-10-01	490326015.289968970
1977-01-01	343188031.775497000
1977-04-01	118007264.536082000
1977-07-01	651488176.280502100
1977-10-01	923170460.759692000
1978-01-01	915177161.027927000
1978-04-01	369183473.083960000
1978-07-01	831206030.872887000
1978-10-01	584597209.258554900
1979-01-01	205043975.333743000
1979-04-01	295559890.053323030
1979-07-01	777912026.711990000
1979-10-01	1087968134.390350000
1980-01-01	1396101085.621940100
1980-04-01	885363389.258260000
1980-07-01	1804295382.722660000
1980-10-01	1800690524.137410000
1981-01-01	966652774.397635900
1981-04-01	479769865.250483000
1981-07-01	269504650.350114000
1981-10-01	1908893871.568170000
1982-01-01	2320777774.189020000
1982-04-01	3550471081.697240000
1982-07-01	3531498422.766160000
1982-10-01	4092884012.850030000
1983-01-01	3066876617.792140000
1983-04-01	3687502186.907880300
1983-07-01	2326446382.927799700
1983-10-01	3166077646.930150000
1984-01-01	2555227117.093300000
1984-04-01	3238210002.818360000
1984-07-01	2913216712.407490300
1984-10-01	4325100816.950850500
1985-01-01	3410996808.029120000
1985-04-01	2981684216.860230400
1985-07-01	1398505204.531060000
1985-10-01	3273024721.860700000
1986-01-01	1073283021.478729800
1986-04-01	1188530956.516520000
1986-07-01	827568427.468419000
1986-10-01	2787591602.752320000
1987-01-01	1448843408.020540000
1987-04-01	1582317830.507060000
1987-07-01	1371773303.366290000
1987-10-01	2276980701.635380000
1988-01-01	-858594819.754040000
1988-04-01	2433296558.709590000
1988-07-01	1467236150.337670000
1988-10-01	2925187765.353890000
1989-01-01	781625213.891010000
1989-04-01	-56319461.321516800
1989-07-01	727218374.630620000
1989-10-01	1528148960.019620200
1990-01-01	901971039.305298000
1990-04-01	2961957972.712440000
1990-07-01	3472394754.476960000
1990-10-01	3630456122.905550000
1991-01-01	1994986627.944880000
1991-04-01	3051894178.261060000
1991-07-01	1760844817.881320000
1991-10-01	2393512897.932450000
1992-01-01	2089366241.826690000
1992-04-01	3193233915.047090000
1992-07-01	2676204375.476570000
1992-10-01	4215175299.733840000
1993-01-01	3180601254.189810000
1993-04-01	3833617981.257510000
1993-07-01	2516854924.160570000
1993-10-01	4076095557.119120000
1994-01-01	2590634166.751120000
1994-04-01	3538768876.986829800
1994-07-01	4066955985.783560000
1994-10-01	6574742338.258300000
1995-01-01	5358385532.791890000
1995-04-01	5578510306.306410000
1995-07-01	6612412903.620700000
1995-10-01	9262338688.766670000
1996-01-01	6627343935.451240000
1996-04-01	9163602384.440481000
1996-07-01	8256302266.826269000
1996-10-01	7669139177.281180000
1997-01-01	6738983899.712120000
1997-04-01	3672256673.485210000
1997-07-01	3570802782.130640000
1997-10-01	4204683067.359949600
1998-01-01	2583174329.272410000
1998-04-01	2525342917.195600000
1998-07-01	4131166087.661659700
1998-10-01	4165745261.458609600
1999-01-01	5117104248.049900000
1999-04-01	4970960457.670290000
1999-07-01	6741197303.919130000
1999-10-01	6752601838.579850000
2000-01-01	8256653103.697920000
2000-04-01	8245937138.908239000
2000-07-01	9736572634.889290000
2000-10-01	11532504269.666900000
2001-01-01	13545656736.945700000
2001-04-01	9683276432.152600000
2001-07-01	7970283533.673031000
2001-10-01	8255536866.282370000
2002-01-01	8196881412.503250000
2002-04-01	7003748362.424700000
2002-07-01	7129567571.643311000
2002-10-01	7858918054.134050000
2003-01-01	9138628207.984480000
2003-04-01	5091278977.834220000
2003-07-01	8817295162.551070000
2003-10-01	9093286821.050549000
2004-01-01	11348376661.049700000
2004-04-01	12021852012.516901000
2004-07-01	10285981336.650600000
2004-10-01	9559124996.145720000
2005-01-01	9277879646.320070000
2005-04-01	8292162198.255489000
2005-07-01	11664409664.562900000
2005-10-01	16841445860.624500000
2006-01-01	12710752719.501600000
2006-04-01	8134268218.273761000
2006-07-01	7537264134.898740000
2006-10-01	9714214953.720060000
2007-01-01	11590420475.637400000
2007-04-01	12602744385.386799000
2007-07-01	7597610883.420320500
2007-10-01	7795387475.204090000
2008-01-01	12666965418.279500000
2008-04-01	14089687669.710999000
2008-07-01	15275327592.972801000
2008-10-01	5441478773.300120000
2009-01-01	1002452572.646520100
2009-04-01	-2073536006.837140000
2009-07-01	-3125823548.407990000
2009-10-01	-951664446.434205000
2010-01-01	2122564622.381260000
2010-04-01	-1365660051.042030000
2010-07-01	-6528683504.433020000
2010-10-01	1119223670.505050000
2011-01-01	1364745951.456950000
2011-04-01	-3542300552.990310000
2011-07-01	97064591.223812700
2011-10-01	1983318683.892340000
2012-01-01	966702347.819884000
2012-04-01	-2076433301.610100300
2012-07-01	-5563520444.783210000
2012-10-01	-238049321.471037980
2013-01-01	1484197389.118980000
2013-04-01	-1732201818.296340000
2013-07-01	-4059382799.310670400
2013-10-01	741811803.577376000
2014-01-01	5267372318.601860000
2014-04-01	1303138257.763909800
2014-07-01	2941534179.887660000
2014-10-01	3641193453.478010000
2015-01-01	-127632454.495557000
2015-04-01	-5409127888.057270000
2015-07-01	-2470029017.472510000
2015-10-01	-1533036366.560500000
2016-01-01	-1162271086.231310000
2016-04-01	-8756449862.703491000
2016-07-01	-6361031715.629970000
2016-10-01	3818931497.023550000
2017-01-01	1964113161.220670000
2017-04-01	-3680675474.122080300
2017-07-01	-8385998039.446440000
2017-10-01	-1659828330.141049900
2018-01-01	-2532649867.771230000
2018-04-01	-4038491807.159360400
2018-07-01	-1866816687.442620000