Quarter	US Dollars, monthly level
1960-01-01	1128084021.6919600
1960-04-01	1109860154.1160800
1960-07-01	1133558676.2824400
1960-10-01	1120846122.3831000
1961-01-01	1302432650.2304600
1961-04-01	1454964865.3960000
1961-07-01	1496217535.4332800
1961-10-01	1537136358.1186000
1962-01-01	1488844343.2112598
1962-04-01	1450576784.2854002
1962-07-01	1330487948.8695300
1962-10-01	1353117172.1963000
1963-01-01	1488060145.4075300
1963-04-01	1683216722.7475102
1963-07-01	1685099856.5154400
1963-10-01	1850389721.6050400
1964-01-01	1978928361.4154500
1964-04-01	2046705425.8718197
1964-07-01	1846539847.4153101
1964-10-01	2022316157.4346502
1965-01-01	1977667338.1929000
1965-04-01	2155821481.9638500
1965-07-01	1971826906.0161800
1965-10-01	2029618012.5828700
1966-01-01	2213315863.0852500
1966-04-01	2394023557.1589203
1966-07-01	2316168838.4041400
1966-10-01	2537106208.4009300
1967-01-01	2701778122.3486200
1967-04-01	2967124038.5607000
1967-07-01	2812621812.1096096
1967-10-01	3112670567.8090900
1968-01-01	3100395527.2564497
1968-04-01	3235235047.6981900
1968-07-01	3170958917.8272700
1968-10-01	3462663150.3180400
1969-01-01	3440937590.5973997
1969-04-01	3614950842.3114100
1969-07-01	3892355931.9783200
1969-10-01	4143552933.7213097
1970-01-01	4428874659.4313800
1970-04-01	4698939572.6538990
1970-07-01	4850657319.7671200
1970-10-01	4999889114.4885000
1971-01-01	4904335622.1053000
1971-04-01	5038033351.9193400
1971-07-01	4700367095.1324300
1971-10-01	5175580208.6523600
1972-01-01	5411886363.6363600
1972-04-01	5518753246.7532500
1972-07-01	5868938311.6883100
1972-10-01	6671126623.3766190
1973-01-01	7459698751.5866700
1973-04-01	9387284692.4167210
1973-07-01	9967488945.7461400
1973-10-01	11564967704.0129010
1974-01-01	14005532243.0865000
1974-04-01	16746402521.2069990
1974-07-01	15385847613.5427000
1974-10-01	15847045831.1401000
1975-01-01	14526810928.0274010
1975-04-01	14264211559.0460000
1975-07-01	14086124381.9572000
1975-10-01	14957876171.4647000
1976-01-01	14845627833.9935990
1976-04-01	15891818056.6718000
1976-07-01	16814867967.4688000
1976-10-01	17345804846.4479030
1977-01-01	17416468625.1321000
1977-04-01	17878263086.5107000
1977-07-01	17665368900.6749000
1977-10-01	18366810342.0619000
1978-01-01	18296881670.5613020
1978-04-01	19449130883.7166000
1978-07-01	20203464956.0115000
1978-10-01	21993574126.6679000
1979-01-01	23225987530.0517000
1979-04-01	25617749330.4149970
1979-07-01	29076365064.9586030
1979-10-01	31940941902.9348000
1980-01-01	33030454785.9658000
1980-04-01	37216011901.6347050
1980-07-01	34501580174.0364000
1980-10-01	36574382276.4212950
1981-01-01	36597342749.7621000
1981-04-01	35939341133.4836040
1981-07-01	33828081993.2408000
1981-10-01	36414758940.4808040
1982-01-01	35570289121.2570950
1982-04-01	32801104874.4459950
1982-07-01	30992345252.6308000
1982-10-01	32022587253.0218960
1983-01-01	31450646256.1283000
1983-04-01	30367821442.9568980
1983-07-01	30129835080.6975000
1983-10-01	34512738053.1136000
1984-01-01	34624270735.6114000
1984-04-01	34269198994.0404000
1984-07-01	33750941468.3241000
1984-10-01	33465174049.2532000
1985-01-01	32370059463.0007000
1985-04-01	32267146109.0198970
1985-07-01	31562094049.8642000
1985-10-01	34331280455.0892000
1986-01-01	33724859130.2310030
1986-04-01	31741630999.6037980
1986-07-01	30530362592.4995000
1986-10-01	31558807829.6189000
1987-01-01	32369891350.2002000
1987-04-01	36502453210.8010000
1987-07-01	38406223405.7713000
1987-10-01	43679057106.0250000
1988-01-01	44444189732.3472000
1988-04-01	47116175959.0113000
1988-07-01	46951811991.0230000
1988-10-01	48884576650.8288000
1989-01-01	50720853581.1463000
1989-04-01	50707357852.3947000
1989-07-01	53036298221.9046000
1989-10-01	55319492961.4973100
1990-01-01	53677064550.4445950
1990-04-01	54069725680.7147000
1990-07-01	57589904042.8714100
1990-10-01	70015547846.5806000
1991-01-01	61762867194.4177000
1991-04-01	56226341509.9226000
1991-07-01	57485880290.6291000
1991-10-01	61932129123.9360000
1992-01-01	57047186818.0442050
1992-04-01	57393532268.2606000
1992-07-01	59318038996.2396000
1992-10-01	59432432730.2436000
1993-01-01	58057173549.9468000
1993-04-01	60918021237.2940000
1993-07-01	61827214845.7825000
1993-10-01	60790021060.4086000
1994-01-01	61786313082.3204000
1994-04-01	66174960027.3349100
1994-07-01	71950403563.8805000
1994-10-01	75729952504.5833900
1995-01-01	78232835624.7644000
1995-04-01	87121013188.0090000
1995-07-01	83002320854.2957000
1995-10-01	87236933856.5820900
1996-01-01	84481829657.6171000
1996-04-01	87666162618.4389000
1996-07-01	87449465095.3902000
1996-10-01	89399542582.0004000
1997-01-01	87552149660.3196000
1997-04-01	84903519241.0368000
1997-07-01	84938634571.3656000
1997-10-01	81220270233.9576100
1998-01-01	75139819229.8620900
1998-04-01	66894659066.6002000
1998-07-01	67373164437.9603960
1998-10-01	71120638868.9596100
1999-01-01	71752981524.8348000
1999-04-01	71562637135.5646000
1999-07-01	78456986731.2213100
1999-10-01	89377433470.1521900
2000-01-01	89094351920.0027000
2000-04-01	91927086139.3416000
2000-07-01	95617704679.4672000
2000-10-01	102787241612.2830000
2001-01-01	93689693956.4458000
2001-04-01	87963203347.9825000
2001-07-01	84290625154.7168100
2001-10-01	83450888470.3704000
2002-01-01	76597155320.1927000
2002-04-01	81379633867.3325000
2002-07-01	87856478007.4767000
2002-10-01	92125144348.7245000
2003-01-01	92371652957.8793000
2003-04-01	92657784999.6752000
2003-07-01	95088661823.5185100
2003-10-01	103142885738.4370000
2004-01-01	107152947331.0310000
2004-04-01	109122675184.6570000
2004-07-01	114837948499.7800000
2004-10-01	124194730813.3670000
2005-01-01	121011634877.8669900
2005-04-01	127286990262.7850000
2005-07-01	132788189532.9610100
2005-10-01	135129587837.2849900
2006-01-01	138705020647.4470000
2006-04-01	142676424504.0820000
2006-07-01	148296041762.3420000
2006-10-01	149053562923.1080000
2007-01-01	145046915647.3589800
2007-04-01	148526989044.9889800
2007-07-01	155584653503.7270000
2007-10-01	172942054074.3610200
2008-01-01	181858724346.7480200
2008-04-01	190619463014.1730000
2008-07-01	206108256741.2300000
2008-10-01	184154326936.5099800
2009-01-01	129160652797.7120000
2009-04-01	123177923083.1130000
2009-07-01	143441479838.3340000
2009-10-01	155927429416.9279800
2010-01-01	159025303863.8209800
2010-04-01	166730666678.7299800
2010-07-01	179694038854.3260200
2010-10-01	188807514372.7150000
2011-01-01	195810366260.6610000
2011-04-01	208029756913.5890200
2011-07-01	225622158036.1620200
2011-10-01	226445123267.2440200
2012-01-01	223274839008.9480000
2012-04-01	222449727626.9160200
2012-07-01	223646812306.3910200
2012-10-01	216433330393.0820000
2013-01-01	207099812158.5160000
2013-04-01	198966210334.4450000
2013-07-01	208834973122.0959800
2013-10-01	217297197044.3370000
2014-01-01	218668870355.4470200
2014-04-01	197687612878.7410000
2014-07-01	203538521619.3290000
2014-10-01	192833468490.7530200
2015-01-01	170996872641.0900000
2015-04-01	157672722339.7730000
2015-07-01	162925245737.4650000
2015-10-01	156530749207.1930000
2016-01-01	148905511736.3180000
2016-04-01	144067162886.3660000
2016-07-01	156752502086.4570000
2016-10-01	157639665315.3960000
2017-01-01	164393663465.7450000
2017-04-01	162819604308.1680000
2017-07-01	165957398027.9910000
2017-10-01	178665059966.4579800
2018-01-01	185383973242.6139800
2018-04-01	178203420304.0260000