Quarter	US Dollars, monthly level
1960-01-01	188547927.011690000
1960-04-01	108800206.655813000
1960-07-01	81085492.756580200
1960-10-01	208671009.307114000
1961-01-01	114987554.576244000
1961-04-01	64412271.180354300
1961-07-01	211119618.160197000
1961-10-01	155458459.549842980
1962-01-01	-59128859.290453600
1962-04-01	-58195055.460785694
1962-07-01	-65316399.905320800
1962-10-01	-155850833.734624980
1963-01-01	-159873162.529893000
1963-04-01	-168749336.837552000
1963-07-01	-92780013.222223090
1963-10-01	-225779598.632182000
1964-01-01	-341097354.955073000
1964-04-01	-395341434.949032000
1964-07-01	-223485003.060600000
1964-10-01	-122385184.822441000
1965-01-01	-162405229.611615000
1965-04-01	-122018393.543491000
1965-07-01	35582251.311891500
1965-10-01	-22480069.847331300
1966-01-01	-260740952.303236000
1966-04-01	-235650804.273135000
1966-07-01	-179747205.030097000
1966-10-01	-304416270.861916000
1967-01-01	-499904693.459816000
1967-04-01	-215292786.953823000
1967-07-01	-142000084.269014000
1967-10-01	-165417223.755750980
1968-01-01	-224475273.053014000
1968-04-01	-409610027.011029000
1968-07-01	-138671073.901608970
1968-10-01	-509452963.450332000
1969-01-01	-578613153.124786000
1969-04-01	-715545338.866802100
1969-07-01	-583062444.598089900
1969-10-01	-423984428.086578000
1970-01-01	18746620.200684800
1970-04-01	39635378.647571005
1970-07-01	-23910011.411596100
1970-10-01	84937609.794085300
1971-01-01	210954915.334101970
1971-04-01	210549819.261477000
1971-07-01	244157382.120502000
1971-10-01	345951137.669222000
1972-01-01	-21565808.391059898
1972-04-01	493428912.783752000
1972-07-01	300539532.405249000
1972-10-01	525742574.257425960
1973-01-01	237195414.778778020
1973-04-01	547269674.679837000
1973-07-01	311363328.849659000
1973-10-01	480429870.237835000
1974-01-01	-887540376.532282000
1974-04-01	-1156078452.819609900
1974-07-01	-1096666318.319570000
1974-10-01	-168397780.537352000
1975-01-01	164551742.381215000
1975-04-01	1138357338.120689900
1975-07-01	283001545.453153970
1975-10-01	-206880958.661492000
1976-01-01	-782491413.746850000
1976-04-01	-357616175.647232060
1976-07-01	-1432376422.626129900
1976-10-01	-1551489157.012869800
1977-01-01	-1343670462.156730000
1977-04-01	-407064398.018521000
1977-07-01	-602343925.768866000
1977-10-01	225618330.713872000
1978-01-01	-506892419.389878900
1978-04-01	716534578.221689900
1978-07-01	251244442.755634000
1978-10-01	131883979.314140000
1979-01-01	-300845836.034334000
1979-04-01	259426594.844991980
1979-07-01	-1235908174.833100000
1979-10-01	-1130553766.902770000
1980-01-01	-4411041663.319250000
1980-04-01	-2827626591.543940000
1980-07-01	-3820767308.112300000
1980-10-01	-3262000241.210880300
1981-01-01	-3484940977.961910200
1981-04-01	-1451154376.292209900
1981-07-01	-2461951656.222019700
1981-10-01	-3544616582.235930000
1982-01-01	-3415755702.100690000
1982-04-01	-3654535318.945610000
1982-07-01	-4083686669.579790000
1982-10-01	-3040816615.062700000
1983-01-01	-3907008484.132790000
1983-04-01	-1200947799.623380000
1983-07-01	-822724912.480528000
1983-10-01	-104435339.057754000
1984-01-01	-2060039330.577520100
1984-04-01	-503976656.406479060
1984-07-01	55458846.634530105
1984-10-01	-125177120.641409010
1985-01-01	-1772737768.942700000
1985-04-01	-98567388.052823700
1985-07-01	-637437966.093888000
1985-10-01	-87614378.394369000
1986-01-01	-540396799.704021000
1986-04-01	-463751620.938322000
1986-07-01	139722914.853120000
1986-10-01	992042171.422779000
1987-01-01	-2125215612.229910100
1987-04-01	-1913844894.256140000
1987-07-01	-665826347.272854900
1987-10-01	-514949780.798403000
1988-01-01	-2945967082.786970000
1988-04-01	-1721850484.540840000
1988-07-01	-1938460077.650240200
1988-10-01	-2541187339.154920000
1989-01-01	-2577969844.775260000
1989-04-01	-3271473398.871980000
1989-07-01	-2056828428.559720000
1989-10-01	-2999270211.098200000
1990-01-01	-2641454613.073620000
1990-04-01	-3122239281.918040000
1990-07-01	-4533930554.342540000
1990-10-01	-4492025113.809299000
1991-01-01	-5067283512.180140000
1991-04-01	-2472649936.197360000
1991-07-01	-2890234849.507360000
1991-10-01	-1202292139.690770000
1992-01-01	-826076355.520070000
1992-04-01	598089435.467564000
1992-07-01	-618931328.839576000
1992-10-01	459806235.277728000
1993-01-01	-497452620.488626000
1993-04-01	603046189.036125000
1993-07-01	1492346942.774880000
1993-10-01	2519899253.053480000
1994-01-01	-195534248.976807980
1994-04-01	1468785988.123990000
1994-07-01	1111516626.017530000
1994-10-01	2271143448.514170000
1995-01-01	2071763864.375290000
1995-04-01	4241984520.445790000
1995-07-01	2111888715.465330100
1995-10-01	3452715731.257100000
1996-01-01	2105613893.529980200
1996-04-01	2007242662.978860000
1996-07-01	2809183917.038030000
1996-10-01	4114850212.019140000
1997-01-01	2867748174.030630000
1997-04-01	4873032038.790720000
1997-07-01	3834290133.046430000
1997-10-01	5343284200.287690000
1998-01-01	3096574420.835060000
1998-04-01	3917156909.165480000
1998-07-01	2384783508.656140000
1998-10-01	3355692610.745590000
1999-01-01	1887940297.544200000
1999-04-01	2283742874.616160000
1999-07-01	3716269094.069209600
1999-10-01	1854803407.459640000
2000-01-01	-2460065378.161700000
2000-04-01	-1014382220.399969900
2000-07-01	-3892254974.014130000
2000-10-01	-3808964310.267800000
2001-01-01	-3443605019.894530000
2001-04-01	-2126761525.811689900
2001-07-01	-789455423.610527000
2001-10-01	1086622335.676180000
2002-01-01	-1843200842.712860000
2002-04-01	1406366531.954720000
2002-07-01	1768966633.952050000
2002-10-01	1374141407.842120000
2003-01-01	-3999304762.471130400
2003-04-01	-2519180263.757830000
2003-07-01	-838164218.694046000
2003-10-01	804135950.918142100
2004-01-01	-2694822978.354750000
2004-04-01	-3444593682.680330000
2004-07-01	-5296515652.629850000
2004-10-01	-7512297027.078500000
2005-01-01	-10948621748.369300000
2005-04-01	-9208021245.934420000
2005-07-01	-10188442175.476198000
2005-10-01	-10330062056.391901000
2006-01-01	-11372675521.783400000
2006-04-01	-11068506775.099699000
2006-07-01	-12368056570.377600000
2006-10-01	-11237901654.019400000
2007-01-01	-13324340425.805000000
2007-04-01	-17095525211.415300000
2007-07-01	-17931676493.827500000
2007-10-01	-23332508331.836800000
2008-01-01	-22667429196.648500000
2008-04-01	-28404151934.441700000
2008-07-01	-27697590807.749600000
2008-10-01	-21778980538.310900000
2009-01-01	-19306417178.712303000
2009-04-01	-18212882981.979400000
2009-07-01	-15368043504.481600000
2009-10-01	-25259537263.400900000
2010-01-01	-20543010486.987602000
2010-04-01	-20876489274.801098000
2010-07-01	-21048662619.933400000
2010-10-01	-24827697741.375900000
2011-01-01	-33543920373.315800000
2011-04-01	-32761858001.806900000
2011-07-01	-30958020619.159500000
2011-10-01	-26325704503.632200000
2012-01-01	-29411143018.534800000
2012-04-01	-28656359727.918102000
2012-07-01	-23634583167.194500000
2012-10-01	-24157186095.743298000
2013-01-01	-26770040349.310000000
2013-04-01	-23662156010.148197000
2013-07-01	-26089314102.936802000
2013-10-01	-25366123151.754200000
2014-01-01	-25952466643.174600000
2014-04-01	-26414949321.341200000
2014-07-01	-26702381667.556000000
2014-10-01	-18873237662.675100000
2015-01-01	-17725850260.979900000
2015-04-01	-15413217639.144000000
2015-07-01	-16714259625.669601000
2015-10-01	-17159959445.272200000
2016-01-01	-18306224843.544900000
2016-04-01	-15224673814.428200000
2016-07-01	-19394750468.889700000
2016-10-01	-17444442972.522300000
2017-01-01	-26135025525.609802000
2017-04-01	-19215082916.629000000
2017-07-01	-22528491427.616800000
2017-10-01	-21186131449.649600000
2018-01-01	-26084156311.108700000
2018-04-01	-25150438107.416603000