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	0.8378
1997-10-01	0.8509
1998-01-01	0.8593
1998-04-01	0.8537
1998-07-01	0.8043
1998-10-01	0.8855
1999-01-01	0.8659
1999-04-01	1.0587
1999-07-01	1.0924
1999-10-01	1.1687
2000-01-01	1.3398
2000-04-01	1.3095
2000-07-01	1.3735
2000-10-01	1.3812
2001-01-01	1.3331
2001-04-01	1.4397
2001-07-01	1.4288
2001-10-01	1.3872
2002-01-01	1.3724
2002-04-01	2.0887
2002-07-01	1.9380
2002-10-01	1.8910
2003-01-01	2.3985
2003-04-01	2.7020
2003-07-01	2.9884
2003-10-01	3.1194
2004-01-01	3.1148
2004-04-01	3.7031
2004-07-01	3.0857
2004-10-01	3.2949
2005-01-01	3.2217
2005-04-01	3.5128
2005-07-01	3.8933
2005-10-01	4.3436
2006-01-01	4.8817
2006-04-01	4.7235
2006-07-01	5.0197
2006-10-01	5.0840
2007-01-01	5.0994
2007-04-01	5.7223
2007-07-01	5.9563
2007-10-01	5.9817
2008-01-01	5.9529
2008-04-01	5.8359
2008-07-01	5.6561
2008-10-01	5.5993
2009-01-01	5.4413
2009-04-01	6.0528
2009-07-01	6.0295
2009-10-01	6.7248
2010-01-01	7.8430
2010-04-01	8.5168
2010-07-01	8.6156
2010-10-01	8.7146
2011-01-01	8.0401
2011-04-01	8.0652
2011-07-01	7.6806
2011-10-01	8.7507
2012-01-01	8.8118
2012-04-01	8.7149
2012-07-01	10.2600
2012-10-01	11.0753
2013-01-01	10.6456
2013-04-01	11.1629
2013-07-01	12.6374
2013-10-01	12.5218
2014-01-01	12.5157
2014-04-01	11.9104
2014-07-01	13.0136
2014-10-01	12.5691
2015-01-01	13.3889
2015-04-01	12.9861