Quarter	Billions of US Dollars
1972-07-01	0.0500
1973-01-01	0.0300
1974-04-01	0.0515
1975-01-01	0.0600
1975-04-01	0.0805
1975-10-01	0.0189
1976-01-01	0.0420
1976-04-01	0.0708
1976-07-01	0.0172
1976-10-01	0.0350
1977-01-01	0.0696
1977-04-01	0.0200
1977-07-01	0.1496
1977-10-01	0.1106
1978-04-01	0.0767
1979-04-01	0.1209
1979-07-01	0.0557
1980-04-01	0.0500
1980-07-01	0.0121
1984-07-01	0.0245
1984-10-01	0.0402
1985-01-01	0.1696
1985-04-01	0.0280
1985-07-01	0.2525
1985-10-01	0.0331
1986-01-01	0.4423
1986-04-01	0.1603
1986-07-01	0.0725
1986-10-01	0.1160
1987-01-01	0.4044
1987-07-01	0.3947
1988-01-01	0.7657
1988-04-01	0.5760
1988-07-01	0.6478
1988-10-01	0.4477
1989-01-01	1.1361
1989-04-01	0.4553
1989-07-01	1.0024
1989-10-01	0.4971
1990-01-01	0.7502
1990-04-01	0.3323
1990-07-01	1.0082
1990-10-01	0.2364
1991-01-01	0.1285
1991-04-01	0.4569
1991-07-01	0.6866
1991-10-01	0.8071
1992-01-01	1.0040
1992-04-01	0.5560
1992-07-01	1.0023
1992-10-01	1.7356
1993-01-01	2.7691
1993-04-01	1.2703
1993-07-01	1.6637
1993-10-01	3.5454
1994-01-01	0.7523
1994-04-01	0.4136
1994-07-01	5.7864
1994-10-01	6.6314
1995-01-01	0.3254
1995-04-01	1.5154
1995-07-01	2.6624
1995-10-01	1.1178
1996-01-01	0.4850
1996-04-01	3.6012
1996-07-01	1.6495
1996-10-01	1.2080
1997-01-01	3.3286
1997-04-01	5.4441
1997-07-01	3.0981
1997-10-01	1.3151
1998-01-01	3.9392
1998-04-01	5.9691
1998-07-01	6.8709
1998-10-01	2.7305
1999-01-01	1.9545
1999-04-01	2.7728
1999-07-01	0.9516
1999-10-01	3.5206
2000-01-01	27.2951
2000-04-01	2.2222
2000-07-01	1.3818
2000-10-01	0.9543
2001-01-01	2.3820
2001-04-01	1.7651
2001-07-01	0.3795
2001-10-01	3.6472
2002-01-01	4.3724
2002-04-01	4.1608
2002-07-01	0.4000
2002-10-01	4.5655
2003-01-01	7.3782
2003-04-01	6.2000
2003-07-01	4.1913
2003-10-01	2.7050
2004-01-01	8.7325
2004-04-01	7.0312
2004-07-01	6.1299
2004-10-01	3.1686
2005-01-01	14.9462
2005-04-01	12.8113
2005-07-01	4.9077
2005-10-01	6.2699
2006-01-01	10.9138
2006-04-01	2.0573
2006-07-01	7.5405
2006-10-01	14.1821
2007-01-01	15.9208
2007-04-01	9.9481
2007-07-01	3.1700
2007-10-01	3.2272
2008-01-01	4.0536
2008-04-01	15.5319
2008-07-01	7.8564
2008-10-01	0.0005
2009-01-01	5.4268
2009-04-01	11.0804
2009-07-01	8.9017
2009-10-01	10.7868
2010-01-01	15.7690
2010-04-01	13.4070
2010-07-01	15.6412
2010-10-01	6.9525
2011-01-01	21.1784
2011-04-01	18.6557
2011-07-01	4.8382
2011-10-01	7.8552
2012-01-01	31.9754
2012-04-01	14.8998
2012-07-01	27.4499
2012-10-01	37.6893
2013-01-01	25.4282
2013-04-01	20.1460
2013-07-01	11.3758
2013-10-01	31.4319
2014-01-01	19.0038
2014-04-01	21.5951
2014-07-01	9.2323
2014-10-01	9.5322
2015-01-01	11.6325
2015-04-01	5.3767