Quarter	Billions of US Dollars
1987-01-01	1.70400
1987-04-01	2.05300
1987-07-01	2.29800
1987-10-01	2.28400
1988-01-01	2.20600
1988-04-01	2.33800
1988-07-01	2.53400
1988-10-01	3.12700
1989-01-01	3.02000
1989-04-01	3.23900
1989-07-01	2.91900
1989-10-01	3.76400
1990-01-01	4.13600
1990-04-01	4.56200
1990-07-01	5.10600
1990-10-01	5.01500
1991-01-01	6.67300
1991-04-01	7.77000
1991-07-01	7.53800
1991-10-01	8.95200
1992-01-01	8.13500
1992-04-01	8.53000
1992-07-01	7.67200
1992-10-01	6.35400
1993-01-01	3.55200
1993-04-01	3.09500
1993-07-01	2.42930
1993-10-01	3.04803
1994-01-01	2.68623
1994-04-01	2.90127
1994-07-01	3.03346
1994-10-01	2.49221
1995-01-01	1.37935
1995-04-01	1.45693
1995-07-01	1.52035
1995-10-01	2.21702
1996-01-01	1.69028
1996-04-01	1.53740
1996-07-01	0.91609
1996-10-01	1.08877
1997-01-01	0.59927
1997-04-01	0.55449
1997-07-01	0.69450
1997-10-01	0.56974
1998-01-01	0.16111
1998-04-01	0.10350
1998-07-01	0.00586
1998-10-01	0.01000
1999-01-01	0.56140
1999-04-01	1.67319
1999-07-01	1.49537
1999-10-01	0.78670
2000-01-01	0.70153
2000-04-01	3.27240
2000-07-01	0.39840
2000-10-01	0.15354
2001-01-01	0.92417
2001-04-01	1.07724
2001-07-01	0.76885
2001-10-01	0.30634
2002-01-01	0.10924
2002-04-01	1.44361
2002-07-01	1.56994
2003-01-01	1.94207
2003-04-01	4.69033
2003-07-01	4.13273
2003-10-01	1.69838
2004-01-01	3.26893
2004-04-01	2.79900
2004-07-01	1.56774
2004-10-01	0.02043
2005-01-01	0.56094
2005-04-01	0.23764
2005-07-01	0.12500
2005-10-01	0.00826
2006-01-01	0.40427
2006-04-01	1.02526
2006-07-01	0.52901
2006-10-01	0.00263
2007-01-01	0.18748
2007-04-01	1.38535
2007-07-01	1.31356
2007-10-01	0.26498
2008-01-01	5.02547
2008-04-01	2.31544
2008-07-01	2.77779
2008-10-01	0.22267
2009-01-01	3.49601
2009-04-01	5.01368
2009-07-01	1.44375
2009-10-01	0.01440
2010-01-01	0.01348
2010-04-01	1.34834
2010-07-01	5.74976
2010-10-01	0.02672
2011-01-01	2.67765
2011-04-01	0.31880
2011-07-01	3.57483
2011-10-01	0.02588
2012-01-01	2.22236
2012-04-01	2.50532
2012-07-01	3.71210
2012-10-01	2.93567
2013-01-01	2.20886
2013-04-01	1.26222
2013-07-01	1.37751
2013-10-01	0.53785
2014-01-01	0.54027
2014-04-01	0.52399
2014-07-01	0.48767
2014-10-01	0.24379
2015-01-01	0.16139
2015-04-01	0.25175