Quarter	Billions of US Dollars
1987-01-01	0.7523
1987-04-01	0.7142
1987-07-01	0.7201
1987-10-01	0.7490
1988-01-01	0.6622
1988-04-01	0.6528
1988-07-01	0.6488
1988-10-01	0.6041
1989-01-01	0.5269
1989-04-01	0.5928
1989-07-01	0.5951
1989-10-01	0.5788
1990-01-01	0.5258
1990-04-01	0.3900
1990-07-01	0.7639
1990-10-01	1.6539
1991-01-01	0.7032
1991-04-01	0.8252
1991-07-01	1.2451
1991-10-01	1.9119
1992-01-01	1.3226
1992-04-01	1.1824
1992-07-01	1.1480
1992-10-01	1.8654
1993-01-01	1.7564
1993-04-01	2.4061
1993-07-01	3.0499
1993-10-01	3.7519
1994-01-01	5.3008
1994-04-01	5.8533
1994-07-01	5.8632
1994-10-01	5.2301
1995-01-01	4.3209
1995-04-01	3.6762
1995-07-01	3.8812
1995-10-01	3.6303
1996-01-01	3.3841
1996-04-01	3.4048
1996-07-01	3.3656
1996-10-01	3.3205
1997-01-01	3.1452
1997-04-01	3.1232
1997-07-01	3.0252
1997-10-01	2.9656
1998-01-01	3.0990
1998-04-01	3.0313
1998-07-01	3.0461
1998-10-01	2.7355
1999-01-01	2.7062
1999-04-01	2.7345
1999-07-01	2.6839
1999-10-01	2.4839
2000-01-01	2.4427
2000-04-01	2.5377
2000-07-01	1.9787
2000-10-01	1.8149
2001-01-01	1.8095
2001-04-01	1.7555
2001-07-01	1.7629
2001-10-01	1.7593
2002-01-01	1.7491
2002-04-01	1.7633
2002-07-01	1.7620
2002-10-01	1.7691
2003-01-01	1.6500
2003-04-01	1.6500
2003-07-01	1.4500
2003-10-01	1.2500
2004-01-01	0.6500
2004-04-01	0.6500
2004-07-01	0.6500
2004-10-01	0.6800
2005-01-01	0.6800
2005-04-01	0.6800
2005-07-01	0.6800
2005-10-01	0.6800
2006-01-01	0.6720
2006-04-01	0.4220
2006-07-01	0.4220
2006-10-01	0.4220
2007-01-01	0.5420
2007-04-01	0.5420
2007-07-01	0.6420
2007-10-01	0.6420
2008-01-01	0.6420
2008-04-01	0.6420
2008-07-01	0.6420
2008-10-01	0.6420
2009-01-01	0.2420
2009-04-01	3.2420
2009-07-01	3.2420
2009-10-01	3.2420
2010-01-01	3.2420
2010-04-01	4.2420
2010-07-01	4.5420
2010-10-01	4.5420
2011-01-01	6.5200
2011-04-01	6.5430
2011-07-01	6.5430
2011-10-01	6.5430
2012-01-01	6.5430
2012-04-01	6.6930
2012-07-01	8.1930
2012-10-01	9.1930
2013-01-01	9.1930
2013-04-01	9.3306
2013-07-01	9.2107
2013-10-01	10.4806
2014-01-01	10.4806
2014-04-01	12.2230
2014-07-01	12.2230
2014-10-01	12.4230
2015-01-01	12.4230
2015-04-01	12.4230