Quarter	US Dollars, sum over component sub-periods
1971-04-01	284700890.93810904
1971-07-01	334157257.02822405
1971-10-01	310970597.95249000
1972-01-01	325040001.43386495
1972-04-01	335795001.48130900
1972-07-01	332210001.46549400
1972-10-01	405105001.78706000
1973-01-01	425387055.97208500
1973-04-01	423744671.06966500
1973-07-01	581295616.62010100
1973-10-01	583132750.45243910
1974-01-01	673416977.41362390
1974-04-01	865702395.21863590
1974-07-01	944894607.41374790
1974-10-01	976476377.24014600
1975-01-01	831490073.40915700
1975-04-01	756661988.71236900
1975-07-01	661702097.25320600
1975-10-01	775657832.59353200
1976-01-01	765574061.71727990
1976-04-01	761559885.34644900
1976-07-01	769812913.10692600
1976-10-01	780934863.21008100
1977-01-01	774893729.33536800
1977-04-01	817750242.98844600
1977-07-01	854732159.98681700
1977-10-01	785844423.17008400
1978-01-01	721528097.77030600
1978-04-01	777938581.44126400
1978-07-01	905627498.27731100
1978-10-01	871093895.94706890
1979-01-01	901506309.98710700
1979-04-01	1088732579.20933000
1979-07-01	1085376833.28646000
1979-10-01	1180613330.16773000
1980-01-01	1243079040.05758000
1980-04-01	1197517682.08312000
1980-07-01	1351412686.36118000
1980-10-01	1304475052.20386000
1981-01-01	1154571673.94068000
1981-04-01	1424129566.10950000
1981-07-01	1344471433.44199010
1981-10-01	1421333525.04963000
1982-01-01	1337544226.79113000
1982-04-01	1588102799.45786000
1982-07-01	1398121276.83062000
1982-10-01	1280421830.11364000
1983-01-01	1097094983.19612000
1983-04-01	1216306589.99261000
1983-07-01	1375104154.94294000
1983-10-01	1302998998.65763000
1984-01-01	1448078866.67061000
1984-04-01	1542189293.62306000
1984-07-01	1504247184.55048000
1984-10-01	1352179879.30268000
1985-01-01	1333433744.43541000
1985-04-01	1349159493.44937010
1985-07-01	1575114674.79476000
1985-10-01	1390735176.37647000
1986-01-01	1521079838.04014000
1986-04-01	1357446245.03065010
1986-07-01	1477561205.30600000
1986-10-01	1386491616.17364000
1987-01-01	1473110134.23872020
1987-04-01	1584585244.26701000
1987-07-01	1753237186.81911020
1987-10-01	1849158080.05899000
1988-01-01	1600336470.60583000
1988-04-01	1590944984.53914000
1988-07-01	1691211555.37394000
1988-10-01	1772638977.24962000
1989-01-01	1744478387.44159000
1989-04-01	1851494905.70687000
1989-07-01	2027362839.86446000
1989-10-01	2241011224.41848040
1990-01-01	1882875137.88069000
1990-04-01	1931392832.74198000
1990-07-01	2253514330.72565000
1990-10-01	2217446540.36053000
1991-01-01	1919400377.60936000
1991-04-01	1748969476.53712000
1991-07-01	1889561862.95377020
1991-10-01	1943744497.58519000
1992-01-01	1894848608.04507000
1992-04-01	1895741250.59352000
1992-07-01	2173351109.87098030
1992-10-01	2151008914.68045000
1993-01-01	1857885627.06508000
1993-04-01	2081868024.24415020
1993-07-01	2419550598.55988030
1993-10-01	2388629345.57228000
1994-01-01	2166424968.63304000
1994-04-01	2452294614.19046970
1994-07-01	2968874622.43378000
1994-10-01	3058128717.58656020
1995-01-01	2847107725.70645000
1995-04-01	2984013232.54816000
1995-07-01	3434458319.16118000
1995-10-01	3317690921.58309030
1996-01-01	3085582684.61512000
1996-04-01	3291600585.19602970
1996-07-01	3789269496.03369000
1996-10-01	3633427637.74536000
1997-01-01	3114979492.64490000
1997-04-01	3639707459.35050000
1997-07-01	3350666587.05060000
1997-10-01	3271190756.34500000
1998-01-01	2817798220.45437000
1998-04-01	2664893491.74825000
1998-07-01	2811257721.17588000
1998-10-01	3035846451.02185000
1999-01-01	2801837373.25338030
1999-04-01	3054670913.97951000
1999-07-01	3355546046.17423000
1999-10-01	3799261658.42005000
2000-01-01	3042390478.95067020
2000-04-01	3140796353.87926000
2000-07-01	3307738336.69889000
2000-10-01	3338266738.56051000
2001-01-01	2922872939.16849000
2001-04-01	2933458222.82133000
2001-07-01	3261843069.97418980
2001-10-01	3331337911.83001000
2002-01-01	3265355311.68490000
2002-04-01	3293079505.63551000
2002-07-01	3776217674.38244960
2002-10-01	4045136448.11614000
2003-01-01	3723233706.95595000
2003-04-01	4123793906.99796000
2003-07-01	4523360944.63503000
2003-10-01	5025970698.28931000
2004-01-01	4995198533.05118900
2004-04-01	5228282416.59491900
2004-07-01	5655174186.50680000
2004-10-01	6307012502.94819000
2005-01-01	5641256662.50102000
2005-04-01	6176549020.79815000
2005-07-01	6663632853.44700050
2005-10-01	6565008749.43158100
2006-01-01	5741897716.02388000
2006-04-01	5940792760.27740000
2006-07-01	6584349526.71106100
2006-10-01	6748100833.26763100
2007-01-01	6374742360.53543950
2007-04-01	7011341719.94604000
2007-07-01	7593912678.75589900
2007-10-01	8501504800.94054000
2008-01-01	8102519461.56578000
2008-04-01	8979949774.60584000
2008-07-01	9000408967.43475200
2008-10-01	7094960550.23520000
2009-01-01	5118010594.16489000
2009-04-01	5607925652.55516000
2009-07-01	6387984942.46787900
2009-10-01	7169291056.50704000
2010-01-01	6504233677.19431000
2010-04-01	6822172033.61214000
2010-07-01	7588932548.12041000
2010-10-01	8821031321.59195100
2011-01-01	7877418435.37383000
2011-04-01	8835273142.40759800
2011-07-01	9701591854.24292000
2011-10-01	9471912807.61211000
2012-01-01	9115307436.57031000
2012-04-01	8817210263.15403000
2012-07-01	9735020842.16950000
2012-10-01	9909820202.18557000
2013-01-01	8992598611.00146100
2013-04-01	9012464669.63306000
2013-07-01	10298420534.26310000
2013-10-01	10340764918.19380000
2014-01-01	9469272765.91318000
2014-04-01	10024692145.92290000
2014-07-01	10937505399.79390000
2014-10-01	10553312187.64950000
2015-01-01	8666243188.94099000
2015-04-01	8808228425.98502000
2015-07-01	9149757791.40621000
2015-10-01	9154973967.42877000
2016-01-01	7642162151.97538000
2016-04-01	8474146235.92620100
2016-07-01	9713958599.55408100
2016-10-01	9701867737.97709000
2017-01-01	8864356493.23713900
2017-04-01	9382582875.94656000
2017-07-01	10412177619.68260000
2017-10-01	11077523833.42870100
2018-01-01	10161165854.39840000
2018-04-01	10584214759.53170000