Quarter	US Dollars, monthly level
1960-01-01	1354516806.7366000
1960-04-01	1345890410.9680900
1960-07-01	1429828767.1375000
1960-10-01	1428318584.0751700
1961-01-01	1278282828.2917200
1961-04-01	1427364185.1202600
1961-07-01	1533624031.0196800
1961-10-01	1578256674.1808000
1962-01-01	1331912185.8112700
1962-04-01	1507019466.9643100
1962-07-01	1491855690.5139499
1962-10-01	1603657611.4162400
1963-01-01	1378835769.3908699
1963-04-01	1621120029.7062900
1963-07-01	1634824704.7616200
1963-10-01	1835599333.6535099
1964-01-01	1650778372.1787800
1964-04-01	1989929947.4725000
1964-07-01	2060342030.8745499
1964-10-01	1996197718.6494100
1965-01-01	1718065764.0324898
1965-04-01	2006756444.0853398
1965-07-01	2050098492.6801800
1965-10-01	2356923019.7221200
1966-01-01	2078971419.7348400
1966-04-01	2394164786.3114700
1966-07-01	2517842699.1532400
1966-10-01	2607164208.5510800
1967-01-01	2438048771.4741500
1967-04-01	2783106802.7185400
1967-07-01	2535997621.8654300
1967-10-01	2828072935.3995900
1968-01-01	2794350924.2835700
1968-04-01	3265181013.7393400
1968-07-01	3121299571.7288600
1968-10-01	3516576070.0891304
1969-01-01	3204024712.1279000
1969-04-01	3573536561.9997997
1969-07-01	3272765266.0893000
1969-10-01	3758382611.2455897
1970-01-01	3664215483.7621500
1970-04-01	4217539809.6818400
1970-07-01	3960248289.3785600
1970-10-01	4278253106.6400003
1971-01-01	4043842366.2014804
1971-04-01	4573495062.5842600
1971-07-01	4284750246.1763396
1971-10-01	4746826072.5096300
1972-01-01	4424353938.2228700
1972-04-01	5431068825.9477005
1972-07-01	4610605289.9621000
1972-10-01	5878893832.2138605
1973-01-01	5642530539.0579810
1973-04-01	6655196786.9979600
1973-07-01	5842316812.5026200
1973-10-01	7282024132.8066300
1974-01-01	7201866074.6463700
1974-04-01	8725519091.9052700
1974-07-01	8242676462.1208410
1974-10-01	9012307369.9597110
1975-01-01	7759959472.3144010
1975-04-01	8623428595.5524800
1975-07-01	7563981376.8792500
1975-10-01	8820860482.4863800
1976-01-01	8876986140.0311400
1976-04-01	10362368449.2830000
1976-07-01	9650459978.2429400
1976-10-01	10145724066.8091000
1977-01-01	10045341491.8585000
1977-04-01	11043515706.9471000
1977-07-01	9963435763.8684000
1977-10-01	10827458901.5381000
1978-01-01	10548461828.9932000
1978-04-01	12464166078.1306000
1978-07-01	11025558926.7255000
1978-10-01	12542631083.3302000
1979-01-01	12736555415.5373000
1979-04-01	13928681892.3105010
1979-07-01	13981076230.2994000
1979-10-01	15417230044.5589000
1980-01-01	16024282558.4085000
1980-04-01	16216153508.0863000
1980-07-01	15403223479.3086010
1980-10-01	17459489870.7231000
1981-01-01	16825988787.2596000
1981-04-01	18699106203.8552000
1981-07-01	16128407803.9126010
1981-10-01	18270698056.2958000
1982-01-01	16888819733.5700990
1982-04-01	18200892244.3908000
1982-07-01	16719622127.0109000
1982-10-01	16712850346.7271020
1983-01-01	16844239040.2898000
1983-04-01	19198078122.0490000
1983-07-01	17356500085.7850000
1983-10-01	20112691460.4072000
1984-01-01	20663932642.7326000
1984-04-01	22693681519.6751980
1984-07-01	21059504493.3266000
1984-10-01	22330363113.9781000
1985-01-01	21267222834.7223000
1985-04-01	22906455820.7805020
1985-07-01	20434308551.0398000
1985-10-01	22839026380.7979000
1986-01-01	20795001113.2838970
1986-04-01	22594149711.8388980
1986-07-01	20520030467.4548000
1986-10-01	22950732811.8641000
1987-01-01	22210815041.3268000
1987-04-01	23763940481.7334000
1987-07-01	22406739797.5568000
1987-10-01	25970009598.5886000
1988-01-01	26904347195.6212000
1988-04-01	29731512091.3058970
1988-07-01	26502429647.0528000
1988-10-01	29399254789.7497020
1989-01-01	29097816954.2186000
1989-04-01	30478801812.8829000
1989-07-01	27319274576.7590980
1989-10-01	30242803757.5932000
1990-01-01	30630753919.8435000
1990-04-01	33594974021.1413960
1990-07-01	30656780555.1937000
1990-10-01	32772863156.0248000
1991-01-01	30260267207.8806000
1991-04-01	33449539830.2764000
1991-07-01	30850756493.9567000
1991-10-01	32844834538.1905980
1992-01-01	32472852856.6121980
1992-04-01	34892754893.9597900
1992-07-01	32688733500.6305960
1992-10-01	34576354491.6360000
1993-01-01	34841821268.9555000
1993-04-01	38210780357.8699000
1993-07-01	34423600372.4519040
1993-10-01	37839212691.7597000
1994-01-01	36658442338.8198000
1994-04-01	41296030714.4420900
1994-07-01	40727316481.4211000
1994-10-01	46452026806.0899000
1995-01-01	46379625942.9353940
1995-04-01	48878577414.6954000
1995-07-01	45866136625.0454000
1995-10-01	50002664001.4707950
1996-01-01	48572188976.2550000
1996-04-01	52094462952.8680950
1996-07-01	49645311265.1143000
1996-10-01	51958308725.4864000
1997-01-01	53328728802.7597000
1997-04-01	54413577068.0107040
1997-07-01	52229452210.0718000
1997-10-01	55206913118.2109000
1998-01-01	53257712508.6516000
1998-04-01	54948788855.5992000
1998-07-01	51210330581.8660050
1998-10-01	55227999792.8832000
1999-01-01	56278286927.7890900
1999-04-01	59710384357.6568000
1999-07-01	59033739364.7873000
1999-10-01	64331978830.1423000
2000-01-01	67886568377.1948100
2000-04-01	70758065357.3054000
2000-07-01	67872439260.8248100
2000-10-01	71630110378.1146000
2001-01-01	70794708714.7046000
2001-04-01	68976272111.6607000
2001-07-01	60652019490.4043000
2001-10-01	60716503988.3758000
2002-01-01	59827145532.9634000
2002-04-01	65419412586.9982100
2002-07-01	62395297288.3372000
2002-10-01	64895538797.7399100
2003-01-01	66437984787.7022100
2003-04-01	68345886633.1180000
2003-07-01	66119129775.2562940
2003-10-01	71605529149.3666100
2004-01-01	74123525142.6189000
2004-04-01	81140362741.9008000
2004-07-01	78687749577.4664000
2004-10-01	83153374913.9701000
2005-01-01	83350593454.1419000
2005-04-01	88284111483.8248000
2005-07-01	89743301670.6607000
2005-10-01	99142454845.7049100
2006-01-01	95629054440.2764100
2006-04-01	98885555826.2992000
2006-07-01	95935991744.3552100
2006-10-01	97798056336.5300000
2007-01-01	98688855715.2470000
2007-04-01	108012106607.9450000
2007-07-01	103514398967.8380100
2007-10-01	109833891533.6150000
2008-01-01	112269829903.9730000
2008-04-01	124422049652.5730000
2008-07-01	122226314576.4599900
2008-10-01	96933259845.7959000
2009-01-01	74003722654.9100000
2009-04-01	74156310613.7070000
2009-07-01	80474735572.2119000
2009-10-01	87842473706.0886000
2010-01-01	91724269882.7938100
2010-04-01	97914070532.3474000
2010-07-01	93824405039.6637000
2010-10-01	103886656926.5920000
2011-01-01	107691314076.9119900
2011-04-01	112584693395.2770000
2011-07-01	116011579017.5380000
2011-10-01	115257067497.0060100
2012-01-01	114563919217.8690000
2012-04-01	116012679707.1259900
2012-07-01	110005570384.3700100
2012-10-01	114902542578.3460100
2013-01-01	113735919764.5699900
2013-04-01	116563533062.6400000
2013-07-01	111862410078.0560000
2013-10-01	115974230541.7420000
2014-01-01	113676500377.4970100
2014-04-01	122225305502.0990000
2014-07-01	122039780669.1350000
2014-10-01	118987771610.4800000
2015-01-01	103277714993.2770100
2015-04-01	105383989586.7230000
2015-07-01	102236732618.8100000
2015-10-01	99360799573.0386000
2016-01-01	93747507506.4937000
2016-04-01	95978615909.6662000
2016-07-01	98072811586.9218000
2016-10-01	102424262597.6619900
2017-01-01	103374953616.9300000
2017-04-01	106806296483.9730000
2017-07-01	101822509712.3180000
2017-10-01	108899920773.2590000
2018-01-01	108695070864.7900000
2018-04-01	116757063295.5300000
2018-07-01	113275250503.0730000