Quarter	US Dollars, monthly level
1960-01-01	30726566.833056000
1960-04-01	18302828.618968400
1960-07-01	33487340.602476400
1960-10-01	108425720.620843010
1961-01-01	81596452.328159600
1961-04-01	58093126.385809300
1961-07-01	59977827.050997800
1961-10-01	146341463.414634000
1962-01-01	95565410.199556600
1962-04-01	68736141.906873600
1962-07-01	68847006.651884700
1962-10-01	147228381.374723000
1963-01-01	124279379.157428000
1963-04-01	49667405.764966700
1963-07-01	61640798.226164095
1963-10-01	131485587.583148990
1964-01-01	97898230.088495600
1964-04-01	69800884.955752200
1964-07-01	59402654.867256600
1964-10-01	181858407.079646020
1965-01-01	106305309.734513000
1965-04-01	99778761.061946900
1965-07-01	88163716.814159300
1965-10-01	166814159.292034980
1966-01-01	144358407.079646000
1966-04-01	88384955.752212400
1966-07-01	75663716.814159300
1966-10-01	186393805.309734020
1967-01-01	134734513.274336000
1967-04-01	94469026.548672600
1967-07-01	82853982.300885000
1967-10-01	208075221.238938000
1968-01-01	156305309.734513000
1968-04-01	74336283.185840710
1968-07-01	73783185.840708000
1968-10-01	189712389.380531000
1969-01-01	125575774.336283000
1969-04-01	118313938.053097010
1969-07-01	103484734.513274000
1969-10-01	187083517.699114980
1970-01-01	187721681.417573000
1970-04-01	136760619.470224000
1970-07-01	90638338.905112600
1970-10-01	154117989.950470000
1971-01-01	161626800.670773000
1971-04-01	91222244.556540500
1971-07-01	103861239.531474000
1971-10-01	256558431.819539000
1972-01-01	253118021.203079020
1972-04-01	156288904.594668000
1972-07-01	144427985.866675000
1972-10-01	285478515.902938000
1973-01-01	304509142.857143000
1973-04-01	302948928.571428000
1973-07-01	268949642.857143000
1973-10-01	411511714.285714000
1974-01-01	499536785.714286000
1974-04-01	371924142.857143000
1974-07-01	262796071.428571000
1974-10-01	379319785.714285970
1975-01-01	363520857.142856960
1975-04-01	289309710.399546000
1975-07-01	351566147.680483000
1975-10-01	396899525.423729000
1976-01-01	829833438.235294000
1976-04-01	376730314.691943000
1976-07-01	330614625.000000000
1976-10-01	439957886.462882000
1977-01-01	522018516.320475040
1977-04-01	400218685.714285970
1977-07-01	310969190.761335000
1977-10-01	521368519.480520000
1978-01-01	548728582.677164900
1978-04-01	467881040.000000000
1978-07-01	456444080.000000000
1978-10-01	825110920.000000000
1979-01-01	886649480.000000000
1979-04-01	559922535.256419000
1979-07-01	339110902.705778960
1979-10-01	430796680.623006050
1980-01-01	847763133.285491000
1980-04-01	595137107.825309000
1980-07-01	544124341.873499000
1980-10-01	924787733.426688000
1981-01-01	1230487747.684130000
1981-04-01	1035381488.080310100
1981-07-01	1006948365.188939900
1981-10-01	1503897707.867080200
1982-01-01	1304167299.618610000
1982-04-01	1235918216.299420000
1982-07-01	1278641266.884570000
1982-10-01	1931409507.495420000
1983-01-01	1361004545.025160000
1983-04-01	1313155001.896050000
1983-07-01	1237752301.806090000
1983-10-01	1825057316.650800000
1984-01-01	1863522137.720450200
1984-04-01	1687028966.945940000
1984-07-01	1540374673.891220000
1984-10-01	2063684449.453489800
1985-01-01	1775126236.669790000
1985-04-01	1860941377.651870000
1985-07-01	2086350270.445109800
1985-10-01	2228633942.319330000
1986-01-01	1876874917.569020000
1986-04-01	1686257498.502170000
1986-07-01	1660128322.733240000
1986-10-01	2235743703.067260000
1987-01-01	1990839269.120570200
1987-04-01	2230245623.854230000
1987-07-01	2634364766.667040000
1987-10-01	3314044981.954090000
1988-01-01	2800638418.301500000
1988-04-01	2714626288.802010000
1988-07-01	2605858755.985050000
1988-10-01	3534833301.423080000
1989-01-01	2812229682.750330000
1989-04-01	2571868779.538270000
1989-07-01	2573516108.974100000
1989-10-01	3679157050.877760000
1990-01-01	2971748486.447930300
1990-04-01	2753997270.534480000
1990-07-01	2862966365.783900300
1990-10-01	4366062178.577821000
1991-01-01	3395489780.823710000
1991-04-01	2910319321.537220000
1991-07-01	3217058977.651940000
1991-10-01	4105058731.506200300
1992-01-01	3555955904.009649800
1992-04-01	3304008316.415469600
1992-07-01	3704993422.604590000
1992-10-01	4173697876.588310200
1993-01-01	3671681202.174200000
1993-04-01	3467610871.962140000
1993-07-01	3565174871.223660000
1993-10-01	4645307573.413919000
1994-01-01	3824984127.050830000
1994-04-01	3769462858.527600000
1994-07-01	4815453671.536970000
1994-10-01	5606372361.918660000
1995-01-01	4764953236.379730000
1995-04-01	5177820042.110769000
1995-07-01	5271944363.973370000
1995-10-01	6430725242.997120000
1996-01-01	5540416776.711620000
1996-04-01	5192861181.205480000
1996-07-01	5743965075.148399000
1996-10-01	6701136699.155490000
1997-01-01	6102065282.613420500
1997-04-01	6359482645.931789000
1997-07-01	6534055044.646570000
1997-10-01	7345140570.865610000
1998-01-01	6740438836.848350000
1998-04-01	6589132386.852770000
1998-07-01	6654353283.470890000
1998-10-01	6982689515.689190000
1999-01-01	6525013373.477970000
1999-04-01	6315334910.269429000
1999-07-01	6473441741.968960000
1999-10-01	7289541604.627450000
2000-01-01	6703512337.197860000
2000-04-01	7092379392.121230000
2000-07-01	6729667573.733190000
2000-10-01	7223147132.348240000
2001-01-01	7395752570.446720000
2001-04-01	8017339677.207801000
2001-07-01	7645347304.449030000
2001-10-01	8275356192.200829500
2002-01-01	7844571840.667030000
2002-04-01	8440164520.005340000
2002-07-01	9245032249.196640000
2002-10-01	10327335849.868200000
2003-01-01	10317275568.049400000
2003-04-01	11300926815.777300000
2003-07-01	12131639793.307100000
2003-10-01	13316819305.026300000
2004-01-01	13489033025.392100000
2004-04-01	15495063845.138000000
2004-07-01	16010671394.603000000
2004-10-01	18174955982.458103000
2005-01-01	17315231039.360300000
2005-04-01	18235663021.355800000
2005-07-01	18200432594.985203000
2005-10-01	20061418909.921500000
2006-01-01	18696792271.213800000
2006-04-01	21415704072.640900000
2006-07-01	21633226803.897600000
2006-10-01	24263878939.969997000
2007-01-01	23279883719.399600000
2007-04-01	26571827354.522400000
2007-07-01	26891728627.745800000
2007-10-01	31124040331.397300000
2008-01-01	33250860569.352802000
2008-04-01	35789518320.645400000
2008-07-01	36690726130.037605000
2008-10-01	27027506137.704000000
2009-01-01	24596833363.414600000
2009-04-01	23399137349.090298000
2009-07-01	25509377496.976997000
2009-10-01	29188895830.536300000
2010-01-01	26144855303.373400000
2010-04-01	28863194883.462200000
2010-07-01	27045550273.644700000
2010-10-01	32370717604.160200000
2011-01-01	31589383940.531500000
2011-04-01	34310780267.428100000
2011-07-01	33981821907.257397000
2011-10-01	35639111581.434100000
2012-01-01	35448323559.042300000
2012-04-01	39171596103.070000000
2012-07-01	38813107354.273700000
2012-10-01	39813138091.976810000
2013-01-01	37116148422.239494000
2013-04-01	38153654176.391000000
2013-07-01	37284332294.077896000
2013-10-01	39463173537.451500000
2014-01-01	40185612865.148000000
2014-04-01	39978548073.798900000
2014-07-01	38341723222.742600000
2014-10-01	39236932398.112110000
2015-01-01	37043947498.016600000
2015-04-01	36399466175.026100000
2015-07-01	33737576754.223904000
2015-10-01	36748718632.829100000
2016-01-01	34677319422.955400000
2016-04-01	36958239074.154000000
2016-07-01	32638391680.031197000
2016-10-01	38265907440.032300000
2017-01-01	37845029261.889100000
2017-04-01	39605759906.663795000
2017-07-01	37746850140.659294000
2017-10-01	41941495429.258300000
2018-01-01	41214992224.098900000
2018-04-01	40929850425.974000000
2018-07-01	40599751525.771194000