Quarter	US Dollars, sum over component sub-periods
1991-01-01	-882915352.453126100
1991-04-01	-550514327.462893000
1991-07-01	-512557188.186944000
1991-10-01	-884769743.285050000
1992-01-01	-305566985.035302040
1992-04-01	-433740407.607012000
1992-07-01	-351234749.061113000
1992-10-01	-225920262.857880000
1993-01-01	-142362539.248868000
1993-04-01	-292510265.125764970
1993-07-01	-144568275.478371000
1993-10-01	-634624817.257978000
1994-01-01	-38567579.167150000
1994-04-01	-509622925.400678040
1994-07-01	67609350.460908200
1994-10-01	-1227778744.493389800
1995-01-01	-150675525.420674000
1995-04-01	-2098433849.018770200
1995-07-01	-307248475.609756000
1995-10-01	-303573753.950603000
1996-01-01	-134517419.135171980
1996-04-01	-182487587.883566980
1996-07-01	-1190838276.660140000
1996-10-01	-789743835.347926000
1997-01-01	-347956488.089255000
1997-04-01	-317389959.722140970
1997-07-01	769049402.720938000
1997-10-01	-349507125.241871000
1998-01-01	296794084.011436000
1998-04-01	-78182314.253856110
1998-07-01	567302740.627304100
1998-10-01	-829083939.387861000
1999-01-01	243583473.789816000
1999-04-01	-59178011.650782000
1999-07-01	-888221661.119876000
1999-10-01	55007879.019283205
2000-01-01	157962300.548147000
2000-04-01	-308180936.044918000
2000-07-01	-912720281.338784100
2000-10-01	-1017300486.911530000
2001-01-01	509302567.044927000
2001-04-01	-11359505.253113100
2001-07-01	-3441833096.838579700
2001-10-01	664584382.683582100
2002-01-01	140260693.823865030
2002-04-01	-68971091.281373410
2002-07-01	60988673.360966995
2002-10-01	-2887347726.998440300
2003-01-01	-33279231.125947600
2003-04-01	170383731.429198000
2003-07-01	234136660.607523000
2003-10-01	6963308056.781540000
2004-01-01	350041953.024370000
2004-04-01	212123333.852951970
2004-07-01	233531357.984326000
2004-10-01	-707289656.639684900
2005-01-01	-1994518396.732190000
2005-04-01	94388321.548954710
2005-07-01	-1781690807.264340000
2005-10-01	586354179.865199900
2006-01-01	157579591.867662000
2006-04-01	-30165241.089037700
2006-07-01	-316087143.257210970
2006-10-01	-1079649650.422890200
2007-01-01	183556143.074873000
2007-04-01	479916016.785517000
2007-07-01	411087780.750046970
2007-10-01	-1846116597.300910000
2008-01-01	755096552.814056000
2008-04-01	379580116.371129040
2008-07-01	-446853845.234414000
2008-10-01	-1203048163.611810000
2009-01-01	28623301.969921900
2009-04-01	336370250.753251970
2009-07-01	51495254.536271300
2009-10-01	-3244271078.926890000
2010-01-01	362547319.937137000
2010-04-01	-550207242.912898000
2010-07-01	12923438.417857802
2010-10-01	-1252806738.317920000
2011-01-01	1286559187.394389900
2011-04-01	-418835477.740740000
2011-07-01	134136597.059139010
2011-10-01	-1985960962.493549800
2012-01-01	200645865.129055020
2012-04-01	421894165.603202000
2012-07-01	-7508087.392224780
2012-10-01	-3418414635.094619800
2013-01-01	319317716.520178000
2013-04-01	101868768.940747010
2013-07-01	-915302984.130166000
2013-10-01	-1766725575.944630000
2014-01-01	1739154873.112840000
2014-04-01	-1149113990.400600000
2014-07-01	105961832.014111000
2014-10-01	-520684095.622594000
2015-01-01	325335843.505579000
2015-04-01	277617982.076232970
2015-07-01	-111169742.570085000
2015-10-01	-2486189410.497560000
2016-01-01	349376469.036577050
2016-04-01	-1361836203.982970000
2016-07-01	-646089968.326380000
2016-10-01	1686301900.726230100
2017-01-01	-125735737.695119000
2017-04-01	-1221852191.552950000
2017-07-01	-736405605.667740000
2017-10-01	-1670897418.161910000
2018-01-01	791397185.732311000
2018-04-01	-16676903.459595898