Quarter	US Dollars, sum over component sub-periods
1993-01-01	-16384917.95618300000
1993-04-01	242088.75934283598
1993-07-01	-29592963.83524510000
1993-10-01	-16865155.97638120000
1994-01-01	-21898432.19706440000
1994-04-01	22233527.64207830000
1994-07-01	53231088.40585260000
1994-10-01	-22745824.58941710000
1995-01-01	-79001436.49800420000
1995-04-01	-17649174.30201000000
1995-07-01	26772008.72952160000
1995-10-01	961599.64903993900
1996-01-01	-94966453.12707141000
1996-04-01	-27259183.68991900000
1996-07-01	-68182028.56410499000
1996-10-01	-83485978.63711760000
1997-01-01	-57545853.02208750000
1997-04-01	-34711861.63230790000
1997-07-01	-186611818.80235700000
1997-10-01	-112397973.76091900000
1998-01-01	81396011.02113600000
1998-04-01	-88901136.35868640000
1998-07-01	112934194.55056800000
1998-10-01	-28001284.30361160300
1999-01-01	245141675.92976198000
1999-04-01	-51712120.15975160000
1999-07-01	-40051560.64570460000
1999-10-01	-304221171.79290503000
2000-01-01	129506680.34773500000
2000-04-01	88499009.70495930000
2000-07-01	-30768150.56118650000
2000-10-01	-164180483.70713900000
2001-01-01	334763176.58361100000
2001-04-01	-67240990.16628839000
2001-07-01	-54897228.96778800000
2001-10-01	-176117190.82255602000
2002-01-01	-174201794.10459900000
2002-04-01	6333330.46477317100
2002-07-01	-54670458.47725140000
2002-10-01	-227181793.54849500000
2003-01-01	268766556.37273600000
2003-04-01	-248878605.84098100000
2003-07-01	93574582.87410781000
2003-10-01	223014513.55471200000
2004-01-01	-174242114.65934202000
2004-04-01	21689215.41229740000
2004-07-01	-438282051.54270500000
2004-10-01	304315343.33771300000
2005-01-01	136597336.26769500000
2005-04-01	-733154827.30296800000
2005-07-01	-540540497.89876900000
2005-10-01	-433305100.48028904000
2006-01-01	-1136406623.75144000000
2006-04-01	-808303554.73364290000
2006-07-01	-1328110948.99854000000
2006-10-01	-723708732.78803400000
2007-01-01	-749483325.58756600000
2007-04-01	-1125492108.14911000000
2007-07-01	-1362025845.31375000000
2007-10-01	869333.36618254390
2008-01-01	-353706922.65661000000
2008-04-01	-443188022.72179400000
2008-07-01	-407639294.96570003000
2008-10-01	118427638.42651899000
2009-01-01	238119691.03812000000
2009-04-01	-512354664.56702300000
2009-07-01	508477560.67219000000
2009-10-01	-479704851.97797900000
2010-01-01	532659443.55292094000
2010-04-01	-152871857.97321600000
2010-07-01	1041264254.64732000000
2010-10-01	1638407127.94629000000
2011-01-01	517084680.84225100000
2011-04-01	518866631.35923195000
2011-07-01	2935755922.16170000000
2011-10-01	1467239815.57359000000
2012-01-01	34490106.22806630000
2012-04-01	599756538.76175500000
2012-07-01	-52806881.32531430000
2012-10-01	447093334.01294500000
2013-01-01	-159131060.38154298000
2013-04-01	972324339.44085000000
2013-07-01	-73118270.22284400000
2013-10-01	-509600967.36030000000
2014-01-01	-6441314.34486238000
2014-04-01	-286318617.17857500000
2014-07-01	509146602.82780397000
2014-10-01	91775254.26441410000
2015-01-01	337156003.90976100000
2015-04-01	329159806.63699996000
2015-07-01	-50693402.61195849600
2015-10-01	-231001137.56867700000
2016-01-01	-569141982.99838600000
2016-04-01	-771481338.77377090000
2016-07-01	-253860911.56174700000
2016-10-01	-167444929.95070702000
2017-01-01	-142997762.70071998000
2017-04-01	-494019805.98162496000
2017-07-01	-239243735.04707903000
2017-10-01	-9655643.99501599000
2018-01-01	-449031881.46985400000
2018-04-01	1089954761.82359000000