Quarter	US Dollars, monthly level
1960-01-01	151366666.66666700
1960-04-01	177266666.66666698
1960-07-01	189800000.00000000
1960-10-01	183600000.00000000
1961-01-01	164366666.66666698
1961-04-01	173033333.33333302
1961-07-01	168766666.66666700
1961-10-01	207933333.33333300
1962-01-01	175733333.33333300
1962-04-01	173266666.66666700
1962-07-01	167366666.66666698
1962-10-01	184900000.00000000
1963-01-01	159566666.66666698
1963-04-01	191766666.66666700
1963-07-01	213100000.00000000
1963-10-01	239833333.33333302
1964-01-01	186100000.00000000
1964-04-01	210933333.33333302
1964-07-01	238900000.00000000
1964-10-01	249200000.00000000
1965-01-01	245300000.00000000
1965-04-01	297633333.33333296
1965-07-01	264566666.66666700
1965-10-01	326300000.00000000
1966-01-01	272900000.00000000
1966-04-01	299800000.00000000
1966-07-01	300266666.66666704
1966-10-01	349833333.33333300
1967-01-01	267033333.33333302
1967-04-01	298700000.00000000
1967-07-01	275700000.00000000
1967-10-01	344833333.33333300
1968-01-01	267466666.66666700
1968-04-01	336800000.00000000
1968-07-01	341000000.00000000
1968-10-01	447933333.33333300
1969-01-01	416300000.00000000
1969-04-01	378933333.33333300
1969-07-01	363800000.00000000
1969-10-01	435066666.66666700
1970-01-01	465466666.66666700
1970-04-01	457800000.00000000
1970-07-01	482733333.33333300
1970-10-01	552400000.00000000
1971-01-01	347966666.66666700
1971-04-01	657300000.00000000
1971-07-01	468733333.33333300
1971-10-01	624133333.33333300
1972-01-01	454233333.33333300
1972-04-01	600666666.66666700
1972-07-01	575666666.66666700
1972-10-01	715133333.33333290
1973-01-01	707200000.00000000
1973-04-01	820300000.00000000
1973-07-01	898966666.66666700
1973-10-01	1047919028.13893990
1974-01-01	937908296.29036400
1974-04-01	1217233333.33333020
1974-07-01	962266666.66666710
1974-10-01	1288966666.66666980
1975-01-01	1289634966.55779000
1975-04-01	1401402077.79702000
1975-07-01	1204054459.89343000
1975-10-01	1466657324.53092000
1976-01-01	1236860912.07920000
1976-04-01	1377726063.43437000
1976-07-01	1537170644.06106000
1976-10-01	1909223677.33214000
1977-01-01	1395515344.73765020
1977-04-01	1777893000.50820020
1977-07-01	1770689799.45228000
1977-10-01	1910318847.08176000
1978-01-01	1606580208.59889000
1978-04-01	1958177547.35390000
1978-07-01	1827781200.79054000
1978-10-01	2439672419.24951030
1979-01-01	1817952058.57429000
1979-04-01	2161501140.90155000
1979-07-01	2720955612.14348000
1979-10-01	2910236959.53400000
1980-01-01	2144878964.86327980
1980-04-01	2482193777.63004970
1980-07-01	2624171565.67393000
1980-10-01	3291781357.92120030
1981-01-01	1079233256.21219000
1981-04-01	2802542444.63332000
1981-07-01	2181981673.98391000
1981-10-01	2753312347.08857000
1982-01-01	3028117942.34862000
1982-04-01	2187058807.90760000
1982-07-01	2334197805.32163000
1982-10-01	2499273189.78356030
1983-01-01	1994017185.64188000
1983-04-01	2567304123.16998000
1983-07-01	1769447404.49056980
1983-10-01	3186632720.55525000
1984-01-01	1919029043.47837000
1984-04-01	2163869882.34042000
1984-07-01	1804189771.73023990
1984-10-01	3558187889.73488000
1985-01-01	1999756873.05191000
1985-04-01	2927249034.29512000
1985-07-01	1952870396.78528000
1985-10-01	3256936652.53553000
1986-01-01	2526103382.95382000
1986-04-01	2852207077.95603000
1986-07-01	2808327951.37789960
1986-10-01	3172249615.57532000
1987-01-01	3038075930.07178000
1987-04-01	2989019114.67246000
1987-07-01	2522472257.13944000
1987-10-01	5345600050.56095000
1988-01-01	2414825478.41631030
1988-04-01	3071358532.75867030
1988-07-01	3137688385.19136000
1988-10-01	3715231915.67847000
1989-01-01	3201040463.15736000
1989-04-01	3425947531.20434000
1989-07-01	4054252634.65798040
1989-10-01	5481005181.16887000
1990-01-01	4816463279.33816050
1990-04-01	5282987821.76398900
1990-07-01	4713028979.29372000
1990-10-01	5000721804.60526000
1991-01-01	5232891943.61257000
1991-04-01	4793207130.97661000
1991-07-01	4540249790.97273100
1991-10-01	7041106819.64571000
1992-01-01	5132017800.80340000
1992-04-01	5922334015.01737000
1992-07-01	5676277264.69407900
1992-10-01	6701911731.45791100
1993-01-01	6832582897.70403000
1993-04-01	7372824256.70195000
1993-07-01	6415203965.92748000
1993-10-01	7331635219.37680000
1994-01-01	5960048790.63626000
1994-04-01	6203107749.48133000
1994-07-01	5972383786.40884000
1994-10-01	7330518158.51822000
1995-01-01	6196525591.91300000
1995-04-01	7506854511.95502000
1995-07-01	7004620125.70539000
1995-10-01	8441068988.20738000
1996-01-01	7087019850.07899950
1996-04-01	8201411910.63133900
1996-07-01	7475486984.53959100
1996-10-01	8715700205.87473900
1997-01-01	7245747686.04890000
1997-04-01	7611459231.48626000
1997-07-01	7007661596.58288000
1997-10-01	7785972095.33647100
1998-01-01	7551240119.98528000
1998-04-01	6893041929.74104000
1998-07-01	7261981298.55083900
1998-10-01	9600513192.27629900
1999-01-01	8034793747.80260900
1999-04-01	7512298414.31676000
1999-07-01	7195456933.28006100
1999-10-01	9123741481.21984000
2000-01-01	8456993121.84775900
2000-04-01	9138884981.02541000
2000-07-01	8170382784.58028000
2000-10-01	8180947818.62717000
2001-01-01	8294963097.81382000
2001-04-01	8676074773.66054000
2001-07-01	7307362106.01917900
2001-10-01	8711206909.29904000
2002-01-01	7803635095.57510000
2002-04-01	8682024635.37832000
2002-07-01	9264836430.58912000
2002-10-01	10715501394.28610000
2003-01-01	11330822880.76350000
2003-04-01	11937531034.86760000
2003-07-01	11551831535.90919900
2003-10-01	13312091868.07359900
2004-01-01	13667730869.78410000
2004-04-01	14202570439.36100000
2004-07-01	13637194710.69760000
2004-10-01	14635839156.46150000
2005-01-01	14717431927.23680100
2005-04-01	14025228571.62740000
2005-07-01	14436628790.01110000
2005-10-01	14545931906.80160000
2006-01-01	15684418952.53790000
2006-04-01	17146072840.49250000
2006-07-01	16894135146.49569900
2006-10-01	17605558603.06110000
2007-01-01	20718623939.05380000
2007-04-01	19984802783.92740000
2007-07-01	20643996250.99990000
2007-10-01	23522513862.56670000
2008-01-01	23846120438.81430000
2008-04-01	26845353360.85210000
2008-07-01	25298000099.50430000
2008-10-01	20539977411.44850000
2009-01-01	16646738651.18249900
2009-04-01	18320463399.58060000
2009-07-01	19402680104.62430000
2009-10-01	19740860194.75270000
2010-01-01	19019085652.95650000
2010-04-01	16713131703.42200000
2010-07-01	15527991744.26320000
2010-10-01	17957042481.70400200
2011-01-01	16865747410.73760000
2011-04-01	18144580602.18230000
2011-07-01	17509512302.74970200
2011-10-01	15574544581.39260000
2012-01-01	16758846021.96160000
2012-04-01	15639657077.10580000
2012-07-01	14755762877.06580000
2012-10-01	16582061201.85219800
2013-01-01	15651959203.16850000
2013-04-01	15203329309.56920000
2013-07-01	15798030345.44190000
2013-10-01	15757602948.83450000
2014-01-01	16504549891.83339900
2014-04-01	16340260415.33369800
2014-07-01	16077393189.01699800
2014-10-01	15277941801.47609900
2015-01-01	12355070305.71290000
2015-04-01	12491239619.41569900
2015-07-01	10672507147.95290000
2015-10-01	12803011765.61590000
2016-01-01	11254424078.69019900
2016-04-01	12901242981.64060000
2016-07-01	11852892897.86699900
2016-10-01	12876407556.99040000
2017-01-01	14300847474.97780000
2017-04-01	13606258018.57760000
2017-07-01	13444584237.48720000
2017-10-01	15363110341.91030000
2018-01-01	16207507701.70609900
2018-04-01	16427155715.70279900