Quarter	Billions of US Dollars
1983-07-01	0.0379
1983-10-01	0.0367
1984-01-01	0.1386
1984-04-01	0.1359
1984-07-01	0.1331
1984-10-01	0.1318
1985-01-01	0.1323
1985-04-01	0.3291
1985-07-01	0.3339
1985-10-01	0.3367
1986-01-01	0.3392
1986-04-01	0.3416
1986-07-01	0.3456
1986-10-01	0.3477
1987-01-01	0.3516
1987-04-01	0.4327
1987-07-01	0.4321
1987-10-01	0.4545
1988-01-01	0.4468
1988-04-01	0.4334
1988-07-01	0.3759
1988-10-01	0.4646
1989-01-01	0.4547
1989-04-01	0.4498
1989-07-01	0.4567
1989-10-01	0.4728
1990-01-01	0.4732
1990-04-01	0.4295
1990-07-01	0.4418
1990-10-01	0.4508
1991-01-01	0.4247
1991-04-01	0.4286
1991-07-01	0.4694
1991-10-01	0.4789
1992-01-01	0.4626
1992-04-01	0.3782
1992-07-01	0.4114
1992-10-01	0.3979
1993-01-01	0.3739
1993-04-01	0.3699
1993-07-01	0.3426
1993-10-01	0.2500
1994-01-01	0.2500
1994-04-01	0.1000
1995-07-01	0.0600
1995-10-01	0.0600
1996-01-01	0.0600
1996-04-01	0.0600
1996-07-01	0.1200
1996-10-01	0.1200
1997-01-01	0.1200
1997-04-01	0.1200
1997-07-01	0.3200
1997-10-01	0.3200
1998-01-01	0.3200
1998-04-01	0.3200
1998-07-01	0.2600
1998-10-01	0.2600
1999-01-01	0.2600
1999-04-01	0.2600
1999-07-01	0.2600
1999-10-01	0.2600
2000-01-01	0.2600
2000-04-01	0.2600
2000-07-01	0.2600
2000-10-01	0.2600
2001-01-01	0.2600
2001-04-01	0.2600
2001-07-01	0.2000
2001-10-01	0.2000
2002-01-01	0.2000
2002-04-01	0.5250
2002-07-01	0.3250
2002-10-01	0.3250
2003-01-01	0.8250
2003-04-01	1.0750
2003-07-01	1.0750
2003-10-01	1.0750
2004-01-01	1.0750
2004-04-01	1.3250
2004-07-01	1.3250
2004-10-01	1.3250
2005-01-01	1.3250
2005-04-01	1.3250
2005-07-01	1.7250
2005-10-01	2.2250
2006-01-01	2.7250
2006-04-01	2.7250
2006-07-01	3.0250
2006-10-01	3.1250
2007-01-01	3.1250
2007-04-01	5.2270
2007-07-01	5.2375
2007-10-01	5.1262
2008-01-01	4.9710
2008-04-01	4.7354
2008-07-01	4.6682
2008-10-01	4.5485
2009-01-01	4.5402
2009-04-01	5.1179
2009-07-01	5.0753
2009-10-01	5.6115
2010-01-01	6.8129
2010-04-01	7.0326
2010-07-01	7.0326
2010-10-01	7.1605
2011-01-01	6.4605
2011-04-01	6.4472
2011-07-01	6.1472
2011-10-01	7.3271
2012-01-01	6.7605
2012-04-01	6.1005
2012-07-01	7.6005
2012-10-01	8.2086
2013-01-01	8.3576
2013-04-01	9.0521
2013-07-01	10.5486
2013-10-01	11.0298
2014-01-01	11.0782
2014-04-01	10.6133
2014-07-01	12.0307
2014-10-01	11.8546
2015-01-01	12.1534
2015-04-01	11.6737