Quarter	US Dollars, monthly level
1960-01-01	425499184.69115996
1960-04-01	450336330.64414304
1960-07-01	460753228.67487000
1960-10-01	546279814.88046400
1961-01-01	476823033.31741200
1961-04-01	489313653.70492303
1961-07-01	501667979.42817100
1961-10-01	575480068.20158400
1962-01-01	520800924.14321900
1962-04-01	535282933.17488500
1962-07-01	540857651.98663400
1962-10-01	618684431.95577910
1963-01-01	549558503.99941400
1963-04-01	591816605.66460410
1963-07-01	581809621.57382390
1963-10-01	693125738.51374100
1964-01-01	600842053.31426300
1964-04-01	654879828.29281900
1964-07-01	644098655.33054500
1964-10-01	754043033.00851310
1965-01-01	672046735.01492300
1965-04-01	717282149.71161090
1965-07-01	727312714.14058790
1965-10-01	855373240.30721300
1966-01-01	763347741.15219700
1966-04-01	808698268.67941000
1966-07-01	794776723.42787600
1966-10-01	916314220.34250400
1967-01-01	813650454.22121600
1967-04-01	869444079.98893110
1967-07-01	820853969.91496400
1967-10-01	999838210.14295800
1968-01-01	912041088.94937990
1968-04-01	960766170.07510600
1968-07-01	989105251.33096110
1968-10-01	1158752558.77407000
1969-01-01	1034188562.59641000
1969-04-01	1126096381.26739000
1969-07-01	1134974408.21508000
1969-10-01	1343814719.79309000
1970-01-01	1162434427.37251000
1970-04-01	1312853872.09362000
1970-07-01	1233312423.03745990
1970-10-01	1427119977.78145000
1971-01-01	1286747212.03897000
1971-04-01	1405449447.62629000
1971-07-01	1408926447.26293000
1971-10-01	1653049346.26594000
1972-01-01	1584025862.07016000
1972-04-01	1674352084.59576000
1972-07-01	1639978819.16995000
1972-10-01	1961497843.87968000
1973-01-01	1999820189.24885000
1973-04-01	2323619972.86857000
1973-07-01	2446729689.88672970
1973-10-01	2723071150.43685000
1974-01-01	2650710611.04648000
1974-04-01	3044351234.22815000
1974-07-01	2846512135.22686000
1974-10-01	3383012744.19878000
1975-01-01	3155433347.98808000
1975-04-01	3357305829.98462000
1975-07-01	2947180053.29041000
1975-10-01	3486969435.54688020
1976-01-01	3316380483.99630000
1976-04-01	3703385278.81599000
1976-07-01	3508815550.56147000
1976-10-01	4315559293.47435950
1977-01-01	3977926122.18865000
1977-04-01	4134371209.85719970
1977-07-01	4204357696.73281960
1977-10-01	5340418853.78545000
1978-01-01	5195523503.30894000
1978-04-01	5653641881.63721900
1978-07-01	5893669241.11263000
1978-10-01	6771289241.32687000
1979-01-01	6177514478.65184000
1979-04-01	6416398017.76787000
1979-07-01	6368234205.79996000
1979-10-01	7535052039.36477100
1980-01-01	7158259670.92046000
1980-04-01	7211463900.15602000
1980-07-01	6952503639.11794950
1980-10-01	7643146219.03547000
1981-01-01	6637973437.51030000
1981-04-01	6476311374.40663050
1981-07-01	6076038759.44936000
1981-10-01	7794020256.51952900
1982-01-01	6960700134.12120000
1982-04-01	6745109781.10563000
1982-07-01	5628606445.60279000
1982-10-01	6676258615.25019000
1983-01-01	6278035390.83960000
1983-04-01	6399673579.53107000
1983-07-01	5960676914.18873000
1983-10-01	6941216390.27395000
1984-01-01	6565739144.19164000
1984-04-01	6761915927.18290000
1984-07-01	5878051321.71100000
1984-10-01	6637783013.20474100
1985-01-01	5814394487.74002000
1985-04-01	6582626310.67486000
1985-07-01	6641477650.63155000
1985-10-01	8428915204.94878000
1986-01-01	8113623841.88601000
1986-04-01	9369212007.60560000
1986-07-01	9480031864.50325000
1986-10-01	10493776505.02950000
1987-01-01	10337074187.08070000
1987-04-01	11276099862.98260000
1987-07-01	10447993872.79600000
1987-10-01	13395531879.76010000
1988-01-01	12907980385.57530000
1988-04-01	12854405599.45980000
1988-07-01	11350946575.84700000
1988-10-01	13585059423.88950000
1989-01-01	12470449424.87800000
1989-04-01	12839246569.28250000
1989-07-01	12036200145.55679900
1989-10-01	14232488096.75200000
1990-01-01	13510722121.92669900
1990-04-01	14234142308.98160000
1990-07-01	14152551401.43770000
1990-10-01	16588508173.41330000
1991-01-01	15097548993.38300100
1991-04-01	14137613823.98980100
1991-07-01	12792342564.23660000
1991-10-01	15344226209.60410000
1992-01-01	14960219060.92179900
1992-04-01	14839340656.99980000
1992-07-01	15624537303.98810000
1992-10-01	15924990851.88350000
1993-01-01	14027807783.35330000
1993-04-01	14950985282.55590000
1993-07-01	13914894838.78510000
1993-10-01	15787378169.14519900
1994-01-01	15402369108.08350000
1994-04-01	15603162721.49100000
1994-07-01	16311291825.73300200
1994-10-01	18883146118.78910000
1995-01-01	18213636798.86080000
1995-04-01	19985930040.62290200
1995-07-01	18765222966.57029700
1995-10-01	20991155144.31450000
1996-01-01	19458691913.00670000
1996-04-01	18875605470.14620200
1996-07-01	18474913262.91760000
1996-10-01	19371626599.01090000
1997-01-01	16819295127.30900200
1997-04-01	18412936644.45710000
1997-07-01	17311594229.04140000
1997-10-01	19988963387.92500000
1998-01-01	18144522228.97850000
1998-04-01	18699006242.14450000
1998-07-01	18107309829.62040300
1998-10-01	20441959463.91380000
1999-01-01	18858516151.12769700
1999-04-01	18434575578.41970000
1999-07-01	18301897747.70140000
1999-10-01	20531254645.13230000
2000-01-01	18830566088.21059800
2000-04-01	18592019878.55750300
2000-07-01	18250820552.90560000
2000-10-01	19288798934.41520000
2001-01-01	20349945528.02550000
2001-04-01	19274347264.07760200
2001-07-01	18548918355.25660000
2001-10-01	19940308122.39760000
2002-01-01	19762124739.00179700
2002-04-01	22027998538.49110000
2002-07-01	22258721789.35780000
2002-10-01	23416652628.18650000
2003-01-01	24147239300.39680000
2003-04-01	24933948714.25540000
2003-07-01	24078017663.26880000
2003-10-01	27686083103.93750000
2004-01-01	29035699538.95409800
2004-04-01	28542155304.40929800
2004-07-01	28508169662.06660000
2004-10-01	31799455575.08770000
2005-01-01	31088205266.17429700
2005-04-01	32767127139.92090200
2005-07-01	30321502623.56540000
2005-10-01	31824654980.33139800
2006-01-01	33075152437.22310300
2006-04-01	35146669860.29880000
2006-07-01	34957666512.62189500
2006-10-01	38555057885.34949500
2007-01-01	39153294309.18239600
2007-04-01	40298698225.52610000
2007-07-01	40584273508.88370000
2007-10-01	44829481430.31620000
2008-01-01	46978551591.92730000
2008-04-01	53402647715.93339500
2008-07-01	48698106514.59270500
2008-10-01	42000627679.61100000
2009-01-01	38442973777.63190000
2009-04-01	40059610158.21380000
2009-07-01	42169372907.86110000
2009-10-01	46049665899.77200000
2010-01-01	44691058412.81889000
2010-04-01	44073852312.56460000
2010-07-01	46038238261.97480000
2010-10-01	51237517133.64040000
2011-01-01	53047008745.72360000
2011-04-01	57795905855.14719400
2011-07-01	57030308882.09470000
2011-10-01	55494046802.73649600
2012-01-01	54504029313.64180000
2012-04-01	53096855890.99350000
2012-07-01	51545303092.47179400
2012-10-01	54923764012.69430000
2013-01-01	52798428661.46190000
2013-04-01	54183994740.47340400
2013-07-01	53567402388.84199500
2013-10-01	56574571495.36150000
2014-01-01	57480910880.88460000
2014-04-01	57890311853.36300000
2014-07-01	56762651418.03340000
2014-10-01	55689700205.61780000
2015-01-01	53095534940.59200000
2015-04-01	52676648810.71260000
2015-07-01	51216273377.27870000
2015-10-01	53842663680.41660000
2016-01-01	51794093445.04800000
2016-04-01	55126833926.50050000
2016-07-01	53781540638.31910000
2016-10-01	52998732688.44140000
2017-01-01	54837562450.03640000
2017-04-01	55408873557.53150000
2017-07-01	55641126530.06669600
2017-10-01	58122357213.45610000
2018-01-01	60802195533.55550000
2018-04-01	60896896161.60280000
2018-07-01	55725931641.05560000