Quarter	Billions of US Dollars
1972-07-01	0.0500
1973-04-01	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
1980-01-01	-0.0250
1980-04-01	0.0500
1980-07-01	0.0121
1981-01-01	-0.0300
1981-04-01	-0.1220
1981-10-01	-0.0350
1982-07-01	-0.0339
1982-10-01	-0.0204
1983-01-01	-0.0600
1983-04-01	-0.0600
1983-07-01	-0.0350
1983-10-01	-0.0172
1984-04-01	-0.0701
1984-07-01	0.0245
1984-10-01	-0.0012
1985-01-01	0.1696
1985-04-01	-0.0220
1985-07-01	0.1525
1985-10-01	-0.0828
1986-01-01	0.1731
1986-04-01	0.3863
1986-07-01	0.0725
1986-10-01	0.0851
1987-01-01	0.4044
1987-04-01	-0.0328
1987-07-01	-0.0045
1987-10-01	0.3911
1988-01-01	0.7657
1988-04-01	0.4521
1988-07-01	0.5409
1988-10-01	0.6679
1989-01-01	0.8928
1989-04-01	0.2933
1989-07-01	1.2778
1989-10-01	0.4971
1990-01-01	0.7502
1990-04-01	0.2679
1990-07-01	0.4770
1990-10-01	0.6818
1991-01-01	0.1285
1991-04-01	0.3207
1991-07-01	0.1000
1991-10-01	1.4165
1992-01-01	0.8020
1992-04-01	0.2822
1992-07-01	1.2523
1992-10-01	0.9003
1993-01-01	2.3165
1993-04-01	1.2725
1993-07-01	2.1758
1993-10-01	2.1943
1994-01-01	1.3601
1994-04-01	0.2934
1994-07-01	5.5774
1994-10-01	6.4177
1995-01-01	-0.7286
1995-04-01	0.3921
1995-07-01	1.5794
1995-10-01	0.5385
1996-01-01	0.3429
1996-04-01	1.9354
1996-07-01	-2.0046
1996-10-01	0.2907
1997-01-01	2.2558
1997-04-01	4.5093
1997-07-01	3.1955
1997-10-01	0.5008
1998-01-01	2.3895
1998-04-01	5.7294
1998-07-01	5.5909
1998-10-01	-1.9183
1999-01-01	1.2400
1999-04-01	0.4709
1999-07-01	-0.4359
1999-10-01	2.8128
2000-01-01	1.9458
2000-04-01	3.3411
2000-07-01	21.3576
2000-10-01	-0.5944
2001-01-01	0.9422
2001-04-01	0.1844
2001-07-01	0.0296
2001-10-01	0.9157
2002-01-01	1.2591
2002-04-01	0.6501
2002-07-01	0.9208
2002-10-01	1.4543
2003-01-01	5.2408
2003-04-01	0.3830
2003-07-01	3.3451
2003-10-01	1.3951
2004-01-01	2.6807
2004-04-01	6.2221
2004-07-01	3.0241
2004-10-01	3.1822
2005-01-01	8.7761
2005-04-01	10.9570
2005-07-01	-3.6780
2005-10-01	5.0180
2006-01-01	9.5371
2006-04-01	-0.7492
2006-07-01	5.2876
2006-10-01	11.3686
2007-01-01	10.5321
2007-04-01	5.2925
2007-07-01	0.1447
2007-10-01	2.7728
2008-01-01	-1.7984
2008-04-01	13.5772
2008-07-01	6.2353
2008-10-01	-1.5750
2009-01-01	-0.7201
2009-04-01	6.2261
2009-07-01	1.6898
2009-10-01	7.6056
2010-01-01	5.2013
2010-04-01	8.8647
2010-07-01	10.3642
2010-10-01	4.7056
2011-01-01	13.4946
2011-04-01	11.7936
2011-07-01	1.0087
2011-10-01	0.3134
2012-01-01	12.0126
2012-04-01	21.5812
2012-07-01	21.8045
2012-10-01	34.2844
2013-01-01	8.9885
2013-04-01	18.3786
2013-07-01	7.4681
2013-10-01	26.6540
2014-01-01	-6.0303
2014-04-01	5.6127
2014-07-01	4.6731
2014-10-01	7.2918
2015-01-01	2.9453
2015-04-01	-1.5580