Quarter	Billions of US Dollars
1990-04-01	0
1990-07-01	0
1990-10-01	0
1991-01-01	0
1991-04-01	0
1991-07-01	0
1991-10-01	0
1992-01-01	0
1992-04-01	0
1992-07-01	0
1992-10-01	0
1993-01-01	0
1993-04-01	0
1993-07-01	250
1993-10-01	217
1994-01-01	295
1994-04-01	302
1994-07-01	318
1994-10-01	318
1995-01-01	291
1995-04-01	318
1995-07-01	344
1995-10-01	308
1996-01-01	295
1996-04-01	273
1996-07-01	46
1996-10-01	296
1997-01-01	304
1997-04-01	335
1997-07-01	297
1997-10-01	247
1998-01-01	235
1998-04-01	240
1998-07-01	239
1998-10-01	184
1999-01-01	217
1999-04-01	193
1999-07-01	192
1999-10-01	198
2000-01-01	191
2000-04-01	151
2000-07-01	162
2000-10-01	94
2001-01-01	166
2001-04-01	619
2001-07-01	585
2001-10-01	551
2002-01-01	572
2002-04-01	130
2002-07-01	197
2002-10-01	109
2003-01-01	75
2003-04-01	78
2003-07-01	196
2003-10-01	242
2004-01-01	269
2004-04-01	517
2004-07-01	305
2004-10-01	531
2005-01-01	472
2005-04-01	845
2005-07-01	967
2005-10-01	1593
2006-01-01	1618
2006-04-01	1111
2006-07-01	1460
2006-10-01	804
2007-01-01	1417
2007-04-01	2069
2007-07-01	2612
2007-10-01	2116
2008-01-01	2160
2008-04-01	1916
2008-07-01	1440
2008-10-01	1127
2009-01-01	802
2009-04-01	2691
2009-07-01	2709
2009-10-01	4490
2010-01-01	4989
2010-04-01	3529
2010-07-01	5029
2010-10-01	3324
2011-01-01	3060
2011-04-01	3257
2011-07-01	2437
2011-10-01	2508
2012-01-01	1899
2012-04-01	2935
2012-07-01	466
2012-10-01	2469
2013-01-01	2084
2013-04-01	538
2013-07-01	1031
2013-10-01	890
2014-01-01	951
2014-04-01	1106
2014-07-01	134
2014-10-01	1326
2015-01-01	1266
2015-04-01	2123
2015-07-01	2175
2015-10-01	1075
2016-01-01	1227
2016-04-01	325
2016-07-01	301
2016-10-01	335
2017-01-01	50
2017-04-01	1246
2017-07-01	1288
2017-10-01	1257
2018-01-01	2373
2018-04-01	1262