Quarter	US Dollars, sum over component sub-periods
1999-01-01	173168868277.495000
1999-04-01	-48348900298.163200
1999-07-01	-80009245864.899800
1999-10-01	103395193612.161990
2000-01-01	325909994064.118040
2000-04-01	157349276812.485020
2000-07-01	131721377172.218000
2000-10-01	239977495328.194980
2001-01-01	689417855349.280000
2001-04-01	-9878954708.555841
2001-07-01	-78760077417.240800
2001-10-01	59929156211.905205
2002-01-01	101212706497.661000
2002-04-01	66579646296.626800
2002-07-01	100853743682.667000
2002-10-01	161208619448.498020
2003-01-01	447166155650.321000
2003-04-01	248094317984.060000
2003-07-01	31557898367.089203
2003-10-01	128796076451.635010
2004-01-01	762105799488.111100
2004-04-01	152301264760.902980
2004-07-01	287120034367.256000
2004-10-01	406502078093.886050
2005-01-01	525634209851.142000
2005-04-01	497336146933.121030
2005-07-01	442623243919.726000
2005-10-01	198330032071.163000
2006-01-01	976324512755.606000
2006-04-01	233702971583.374000
2006-07-01	527874970483.628000
2006-10-01	314238127542.737000
2007-01-01	1426434918963.760000
2007-04-01	871497544264.939100
2007-07-01	607221061913.211900
2007-10-01	299248829090.053960
2008-01-01	1091957951078.559900
2008-04-01	-1109462124015.630000
2008-07-01	-63461560335.188200
2008-10-01	-1406411479541.280000
2009-01-01	-621887149192.156000
2009-04-01	-423342069411.588000
2009-07-01	41124138583.019900
2009-10-01	-390918889225.066000
2010-01-01	386054281580.133000
2010-04-01	177145104834.274020
2010-07-01	573162073341.020000
2010-10-01	83416578184.312090
2011-01-01	537327397478.249000
2011-04-01	-114545732969.338000
2011-07-01	533116651691.118040
2011-10-01	-398165825912.854000
2012-01-01	448415719589.464000
2012-04-01	-363372428743.945000
2012-07-01	86051845074.772700
2012-10-01	-318545913316.856000
2013-01-01	85010709665.611600
2013-04-01	75145420001.794300
2013-07-01	-436694382122.048000
2013-10-01	-210781601593.879000
2014-01-01	362819524698.579000
2014-04-01	267131579735.034030
2014-07-01	205606159477.925000
2014-10-01	-174080551657.065000
2015-01-01	311064626770.605960
2015-04-01	-566825158794.156000
2015-07-01	205580354828.150020
2015-10-01	-353685727801.878000
2016-01-01	399150303609.276000
2016-04-01	631197871607.800000
2016-07-01	6427202186.009260
2016-10-01	-171297377966.223000
2017-01-01	665772992682.861100
2017-04-01	69690967357.451500
2017-07-01	372564657796.810000
2017-10-01	44794932671.028000
2018-01-01	635214025513.287100