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	0.1250
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
1988-10-01	0.7000
1989-07-01	0.0532
1991-10-01	0.2163
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	1.3313
1995-07-01	0.1351
1995-10-01	0.6552
1996-01-01	1.0111
1996-04-01	2.3442
1996-07-01	1.5741
1996-10-01	0.3300
1997-01-01	0.8202
1997-04-01	0.2724
1997-07-01	0.5320
1997-10-01	0.7824
1998-01-01	1.2256
1998-04-01	0.6891
1998-07-01	0.0704
1998-10-01	0.0301
1999-01-01	0.1423
1999-04-01	0.4444
1999-07-01	1.0887
1999-10-01	1.6005
2000-01-01	0.2787
2000-04-01	1.1832
2000-07-01	0.6493
2000-10-01	0.4493
2001-01-01	3.3648
2001-04-01	0.9709
2001-07-01	0.5935
2001-10-01	0.8631
2002-01-01	3.6616
2002-04-01	2.8066
2002-07-01	0.6908
2002-10-01	0.4221
2003-01-01	2.9683
2003-04-01	0.8505
2003-07-01	1.0786
2003-10-01	4.1987
2004-01-01	0.6512
2004-04-01	2.8412
2004-07-01	0.4320
2004-10-01	0.8190
2005-01-01	1.8552
2005-04-01	2.4308
2005-07-01	1.2659
2005-10-01	7.1885
2006-01-01	3.6978
2006-04-01	0.4358
2006-07-01	6.6580
2006-10-01	5.6989
2007-01-01	2.9523
2007-04-01	15.1077
2007-07-01	3.3425
2007-10-01	2.6527
2008-01-01	7.8753
2008-04-01	12.4343
2008-07-01	7.5617
2008-10-01	1.7555
2009-01-01	13.3278
2009-04-01	12.7080
2009-07-01	10.1373
2009-10-01	7.7404
2010-01-01	6.6273
2010-04-01	7.3845
2010-07-01	4.0283
2010-10-01	3.3565
2011-01-01	4.8270
2011-04-01	1.8132
2011-07-01	1.3308
2011-10-01	2.1671
2012-01-01	0.5204
2012-04-01	0.0120
2012-07-01	0.4559
2012-10-01	1.2430
2013-01-01	1.0391
2013-04-01	1.0408
2013-07-01	0.0000
2013-10-01	1.9252
2014-01-01	3.1782
2014-04-01	1.4732
2014-07-01	5.8519
2015-01-01	1.1666
2015-04-01	0.8171