Quarter	Billions of US Dollars
1993-07-01	0.3965
1993-10-01	0.3745
1994-01-01	0.0832
1994-04-01	0.4818
1994-07-01	0.6209
1994-10-01	1.0218
1995-01-01	1.4770
1995-04-01	1.6286
1995-07-01	1.3409
1995-10-01	1.2290
1996-01-01	1.0394
1996-04-01	1.0585
1996-07-01	2.0492
1996-10-01	2.1528
1997-01-01	1.8650
1997-04-01	1.9884
1997-07-01	1.5046
1997-10-01	2.0080
1998-01-01	2.7190
1998-04-01	2.2443
1998-07-01	1.8229
1998-10-01	1.0176
1999-01-01	0.7475
1999-04-01	0.5780
1999-07-01	0.6551
1999-10-01	1.1742
2000-01-01	0.4724
2000-04-01	0.4744
2000-07-01	0.4636
2001-10-01	0.0341
2002-01-01	0.7845
2002-04-01	0.9909
2002-07-01	0.9791
2002-10-01	0.9952
2003-01-01	0.1580
2004-01-01	0.1467
2004-04-01	0.1459
2004-07-01	0.8934
2004-10-01	1.5640
2005-01-01	1.3438
2005-04-01	1.3793
2005-07-01	0.6671
2005-10-01	0.2393
2006-01-01	0.2198
2006-04-01	0.2488
2006-07-01	0.2669
2006-10-01	0.1908
2007-01-01	0.1757
2007-04-01	0.1445
2007-07-01	0.1162
2007-10-01	0.1095
2008-01-01	0.1078
2008-04-01	0.8255
2008-07-01	1.4158
2008-10-01	1.3935
2009-01-01	2.6726
2009-04-01	3.6799
2009-07-01	3.2937
2009-10-01	1.7366
2010-01-01	2.6599
2010-04-01	4.1035
2010-07-01	7.4167
2010-10-01	12.2390
2011-01-01	9.9868
2011-04-01	8.1177
2011-07-01	4.6271
2011-10-01	14.7698
2012-01-01	20.3047
2012-04-01	43.3112
2012-07-01	42.7796
2012-10-01	64.6355
2013-01-01	65.9617
2013-04-01	47.3140
2013-07-01	48.0477
2013-10-01	38.1459
2014-01-01	40.5900
2014-04-01	46.1468
2014-07-01	37.4578
2014-10-01	43.2281
2015-01-01	35.6534
2015-04-01	52.5157