Quarter	Billions of US Dollars
1990-01-01	0.2410
1990-04-01	0.5090
1990-07-01	0.9000
1990-10-01	0.6100
1991-01-01	0.4380
1991-04-01	0.5710
1991-07-01	0.5970
1991-10-01	0.6860
1992-01-01	0.7020
1992-04-01	0.8140
1992-07-01	1.1090
1992-10-01	1.0250
1993-01-01	0.9160
1993-04-01	1.6250
1993-07-01	0.2000
1993-10-01	0.2000
1994-01-01	0.2000
1994-04-01	0.2000
1994-07-01	0.2000
1994-10-01	0.2000
1995-01-01	0.2000
1995-04-01	0.2000
1995-07-01	0.3524
1995-10-01	0.4028
1996-01-01	0.6788
1996-04-01	0.9468
1996-07-01	1.2442
1996-10-01	2.1121
1997-01-01	2.8921
1997-04-01	3.6618
1997-07-01	3.9404
1997-10-01	4.0626
1998-01-01	4.5019
1998-04-01	4.9609
1998-07-01	6.3787
1998-10-01	7.0110
1999-01-01	7.9897
1999-04-01	8.4513
1999-07-01	8.9829
1999-10-01	9.3657
2000-01-01	10.0196
2000-04-01	11.3116
2000-07-01	10.7270
2000-10-01	13.2734
2001-01-01	14.7633
2001-04-01	15.9351
2001-07-01	17.1675
2001-10-01	17.8866
2002-01-01	18.1187
2002-04-01	19.1544
2002-07-01	19.0535
2002-10-01	19.4487
2003-01-01	17.8145
2003-04-01	18.1338
2003-07-01	18.6195
2003-10-01	19.3290
2004-01-01	19.3652
2004-04-01	18.5884
2004-07-01	19.0654
2004-10-01	20.8882
2005-01-01	22.2009
2005-04-01	23.0092
2005-07-01	24.7858
2005-10-01	25.7107
2006-01-01	27.2917
2006-04-01	31.7454
2006-07-01	33.8293
2006-10-01	36.6568
2007-01-01	38.5973
2007-04-01	39.5554
2007-07-01	42.1176
2007-10-01	41.8756
2008-01-01	53.3031
2008-04-01	49.1112
2008-07-01	47.0486
2008-10-01	47.5363
2009-01-01	46.6657
2009-04-01	58.5772
2009-07-01	58.2600
2009-10-01	56.2183
2010-01-01	56.4381
2010-04-01	53.6834
2010-07-01	55.0494
2010-10-01	53.2382
2011-01-01	47.4709
2011-04-01	45.9973
2011-07-01	44.3381
2011-10-01	42.8473
2012-01-01	42.5137
2012-04-01	40.7526
2012-07-01	41.3833
2012-10-01	39.9466
2013-01-01	40.4045
2013-04-01	39.1478
2013-07-01	38.9225
2013-10-01	36.9998
2014-01-01	35.5811
2014-04-01	35.5378
2014-07-01	34.6710
2014-10-01	33.6778
2015-01-01	38.5592
2015-04-01	44.8541