Quarter	Billions of US Dollars
1977-04-01	0.0500
1980-04-01	0.0300
1982-07-01	0.0186
1982-10-01	0.0236
1983-01-01	0.0210
1983-10-01	0.0300
1984-01-01	0.1214
1984-04-01	0.1241
1984-07-01	0.0409
1984-10-01	0.0406
1985-01-01	0.0385
1985-04-01	0.0880
1985-07-01	0.1706
1986-01-01	0.0819
1986-04-01	0.1658
1986-07-01	0.1650
1986-10-01	0.0305
1987-01-01	0.0982
1987-04-01	0.3575
1987-07-01	0.1618
1987-10-01	0.0376
1988-01-01	0.5905
1988-04-01	0.4125
1988-07-01	0.1000
1988-10-01	0.7000
1989-07-01	0.0532
1991-01-01	0.1744
1991-10-01	0.2163
1992-04-01	0.1733
1993-01-01	0.6000
1993-04-01	1.0742
1993-07-01	1.0000
1994-01-01	0.8399
1994-04-01	1.5674
1994-10-01	0.5488
1995-01-01	1.0190
1995-04-01	1.4813
1995-07-01	0.1676
1995-10-01	0.3954
1996-01-01	1.0111
1996-04-01	2.5642
1996-07-01	1.5741
1996-10-01	0.8300
1997-01-01	0.8202
1997-04-01	0.5724
1997-07-01	1.0738
1997-10-01	0.7824
1998-01-01	1.4974
1998-04-01	0.9657
1998-07-01	0.0704
1998-10-01	0.0301
1999-01-01	0.9364
1999-04-01	3.5510
1999-07-01	2.5334
1999-10-01	2.4147
2000-01-01	1.9523
2000-04-01	2.0971
2000-07-01	2.8452
2000-10-01	1.3482
2001-01-01	5.8950
2001-04-01	4.0515
2001-07-01	2.2959
2001-10-01	4.0530
2002-01-01	3.1615
2002-04-01	5.2884
2002-07-01	1.5421
2002-10-01	3.0127
2003-01-01	4.2598
2003-04-01	4.1674
2003-07-01	4.1758
2003-10-01	10.5101
2004-01-01	3.9433
2004-04-01	6.1800
2004-07-01	3.3399
2004-10-01	6.0689
2005-01-01	8.0444
2005-04-01	6.2811
2005-07-01	5.2516
2005-10-01	15.3821
2006-01-01	8.5271
2006-04-01	3.5426
2006-07-01	12.2438
2006-10-01	12.4796
2007-01-01	5.9267
2007-04-01	17.4916
2007-07-01	6.1273
2007-10-01	6.5683
2008-01-01	10.0569
2008-04-01	13.7982
2008-07-01	9.2471
2008-10-01	7.4246
2009-01-01	20.8015
2009-04-01	15.8990
2009-07-01	13.2679
2009-10-01	10.3397
2010-01-01	13.0541
2010-04-01	9.7027
2010-07-01	4.5721
2010-10-01	3.7880
2011-01-01	7.1942
2011-04-01	1.8006
2011-07-01	1.6009
2011-10-01	2.6734
2012-01-01	1.8953
2012-04-01	6.3318
2012-07-01	1.6584
2012-10-01	4.5449
2013-01-01	2.2601
2013-04-01	3.8094
2013-07-01	1.2248
2013-10-01	3.6282
2014-01-01	4.9634
2014-04-01	3.3651
2014-07-01	8.4336
2014-10-01	1.3935
2015-01-01	1.8115
2015-04-01	1.8572