Quarter	Billions of US Dollars
1989-07-01	0.0020
1989-10-01	0.0010
1990-01-01	0.0010
1991-04-01	0.0110
1991-07-01	0.4390
1992-01-01	0.0030
1992-04-01	0.0050
1992-07-01	0.0050
1992-10-01	0.0050
1993-01-01	0.0050
1993-04-01	0.0050
1993-07-01	0.0052
1993-10-01	0.0052
1994-01-01	0.0537
1994-04-01	0.0472
1994-07-01	0.0498
1994-10-01	0.0548
1995-01-01	0.0616
1995-04-01	0.1347
1995-07-01	0.3105
1995-10-01	0.3376
1996-01-01	0.6115
1996-04-01	0.6506
1996-07-01	0.9140
1996-10-01	0.8881
1997-01-01	0.7673
1997-04-01	0.7465
1997-07-01	0.7140
1997-10-01	0.8644
1998-01-01	0.9804
1998-04-01	1.7578
1998-07-01	3.3884
1998-10-01	3.3826
1999-01-01	3.1097
1999-04-01	3.1277
1999-07-01	4.0135
1999-10-01	4.9880
2000-01-01	6.2354
2000-04-01	7.0498
2000-07-01	8.2240
2000-10-01	7.8954
2001-01-01	8.2271
2001-04-01	4.9530
2001-07-01	4.2419
2001-10-01	4.9573
2002-01-01	7.0614
2002-04-01	7.8532
2002-07-01	8.2193
2002-10-01	8.0803
2003-01-01	7.7588
2003-04-01	6.8219
2003-07-01	6.8658
2003-10-01	8.2564
2004-01-01	9.4640
2004-04-01	9.1126
2004-07-01	10.4914
2004-10-01	11.3681
2005-01-01	13.0109
2005-04-01	9.5236
2005-07-01	9.4146
2005-10-01	8.5017
2006-01-01	12.3060
2006-04-01	18.1572
2006-07-01	20.3399
2006-10-01	21.2550
2007-01-01	20.5903
2007-04-01	20.8270
2007-07-01	20.2950
2007-10-01	18.0759
2008-01-01	16.2625
2008-04-01	16.2523
2008-07-01	12.2194
2008-10-01	12.3707
2009-01-01	12.0244
2009-04-01	12.8079
2009-07-01	11.7170
2009-10-01	9.1991
2010-01-01	8.9447
2010-04-01	6.4032
2010-07-01	7.5020
2010-10-01	8.2800
2011-01-01	8.2627
2011-04-01	10.7019
2011-07-01	8.7952
2011-10-01	5.8624
2012-01-01	6.3306
2012-04-01	5.6683
2012-07-01	5.5232
2012-10-01	5.5866
2013-01-01	5.5340
2013-04-01	4.4968
2013-07-01	5.5214
2013-10-01	5.6479
2014-01-01	4.8223
2014-04-01	5.2311
2014-07-01	6.7864
2014-10-01	7.2613
2015-01-01	7.5520
2015-04-01	8.7102