Quarter	US Dollars, sum over component sub-periods
1990-01-01	1438957073.2280200
1990-04-01	1576713882.1087400
1990-07-01	1541699897.4592700
1990-10-01	1532177214.2567499
1991-01-01	1639481099.4736600
1991-04-01	1718643935.6785400
1991-07-01	1402608999.4952800
1991-10-01	1184341710.3551302
1992-01-01	1556475990.7899299
1992-04-01	1712089609.8879900
1992-07-01	1770413286.9833900
1992-10-01	1696122459.4539100
1993-01-01	1537975137.4611502
1993-04-01	1569618314.7659001
1993-07-01	1653684642.5915400
1993-10-01	1735280563.4827101
1994-01-01	1966505869.9360300
1994-04-01	1971735503.8199600
1994-07-01	2096325190.9988399
1994-10-01	2165206028.2442400
1995-01-01	2267360656.8578000
1995-04-01	2336687320.6291003
1995-07-01	2643138021.8467900
1995-10-01	3020608516.4526896
1996-01-01	3265969859.5277000
1996-04-01	2961907934.7722400
1996-07-01	2406581843.3204600
1996-10-01	2536575538.5215898
1997-01-01	2948600635.4299400
1997-04-01	3228251272.9148397
1997-07-01	3144304175.5380200
1997-10-01	3121552400.0557300
1998-01-01	3467276215.2919600
1998-04-01	3810002671.8696300
1998-07-01	3850724228.8280600
1998-10-01	3411894225.0170500
1999-01-01	4675523564.7399210
1999-04-01	3997518700.7003303
1999-07-01	4387058233.5127800
1999-10-01	4211185539.7257004
2000-01-01	4512630768.1800500
2000-04-01	5036515384.6851600
2000-07-01	4594132895.7430900
2000-10-01	5044707281.1329100
2001-01-01	5632627691.1719000
2001-04-01	5117259060.2716100
2001-07-01	5236624060.1535500
2001-10-01	4112379686.0678205
2002-01-01	4914025258.8640790
2002-04-01	5726937000.0574000
2002-07-01	5460386298.1784700
2002-10-01	4937861820.4587800
2003-01-01	7373571221.0361100
2003-04-01	5594888047.8397010
2003-07-01	6613563102.9065600
2003-10-01	5295918591.6174000
2004-01-01	7097794377.6520500
2004-04-01	7720848148.3598795
2004-07-01	9214479453.7167000
2004-10-01	11407834540.3904000
2005-01-01	10915806925.9210010
2005-04-01	11127779429.8304000
2005-07-01	11049722450.2501000
2005-10-01	14073051776.3993000
2006-01-01	13683097497.2017000
2006-04-01	13081066617.7953010
2006-07-01	14749398503.2129000
2006-10-01	17000601689.1757000
2007-01-01	18117816005.2159000
2007-04-01	15363579923.5590000
2007-07-01	17395938806.5484000
2007-10-01	19297517554.6701000
2008-01-01	16967765589.8425000
2008-04-01	12197081483.5205000
2008-07-01	13361464120.6832000
2008-10-01	13036550546.0606000
2009-01-01	12716141319.9253000
2009-04-01	10830000000.0000000
2009-07-01	13583000000.6522000
2009-10-01	15901000000.7523000
2010-01-01	19222000000.7258000
2010-04-01	16975639820.7130010
2010-07-01	19504217929.5510000
2010-10-01	23211113669.5458000
2011-01-01	20864706482.3650000
2011-04-01	17427152202.3908000
2011-07-01	18319334971.2085000
2011-10-01	21146945421.0543020
2012-01-01	20014946225.1529000
2012-04-01	20792438070.9102020
2012-07-01	18694702568.6933980
2012-10-01	20417531645.6086000
2013-01-01	20859375587.3254000
2013-04-01	19686060191.7468000
2013-07-01	18487887722.1250000
2013-10-01	19688896867.1387980
2014-01-01	20884481159.3577000
2014-04-01	20590652355.2798000
2014-07-01	19714950332.3916000
2014-10-01	19928505248.8130000
2015-01-01	21344185882.2947000
2015-04-01	20515049271.1991000
2015-07-01	20892898397.7821000
2015-10-01	19890962478.2143000
2016-01-01	23335752661.7764000
2016-04-01	23635744162.1134000
2016-07-01	24585593691.3328970
2016-10-01	24365349411.3007970
2017-01-01	23265324687.9481000
2017-04-01	27607257456.7253000
2017-07-01	29031716058.6676000
2017-10-01	29466843705.1178000
2018-01-01	31421143798.1442000
2018-04-01	29474502863.7514000