Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0200
1972-10-01	0.0350
1973-01-01	0.0613
1973-07-01	0.0507
1973-10-01	0.0657
1974-10-01	0.0500
1975-01-01	0.0950
1975-04-01	0.0772
1975-07-01	0.0240
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1431
1976-07-01	0.0906
1976-10-01	0.0811
1977-01-01	0.1205
1977-04-01	0.3059
1977-07-01	0.4696
1977-10-01	0.4918
1978-01-01	0.4633
1978-04-01	0.1242
1978-07-01	0.1000
1978-10-01	0.1000
1979-07-01	0.1730
1979-10-01	0.0065
1980-01-01	-0.0368
1980-04-01	0.1610
1980-10-01	0.0752
1981-01-01	0.0750
1981-04-01	0.5392
1981-07-01	0.3354
1981-10-01	0.6900
1982-01-01	0.5286
1982-04-01	0.0324
1982-07-01	0.0912
1982-10-01	-0.0867
1983-01-01	-0.1985
1983-04-01	-0.0961
1983-07-01	-0.0671
1983-10-01	-0.1598
1984-01-01	-0.0444
1984-04-01	-0.0738
1984-07-01	-0.1528
1984-10-01	-0.0250
1985-01-01	-0.0614
1985-04-01	-0.0391
1985-07-01	-0.1340
1985-10-01	-0.2966
1986-04-01	-0.1507
1986-07-01	-0.1103
1986-10-01	-0.2205
1987-01-01	-0.1714
1987-04-01	-0.1589
1987-07-01	-0.0309
1987-10-01	-0.3045
1988-01-01	-0.2411
1988-04-01	-0.3527
1988-07-01	-0.5633
1988-10-01	-0.3972
1989-01-01	-0.1508
1989-04-01	-0.0167
1989-07-01	-0.0004
1989-10-01	0.0310
1990-01-01	35.4122
1990-04-01	0.5675
1990-07-01	0.4952
1990-10-01	0.2730
1991-01-01	0.3243
1991-04-01	1.0000
1991-07-01	0.3301
1991-10-01	0.4596
1992-01-01	0.3556
1992-04-01	0.0462
1992-07-01	0.1730
1992-10-01	1.8470
1993-01-01	0.6084
1993-04-01	2.0012
1993-07-01	0.9813
1993-10-01	1.7375
1994-01-01	3.9105
1994-04-01	1.7846
1994-07-01	0.9257
1994-10-01	0.4150
1995-01-01	-0.9588
1995-04-01	0.6340
1995-07-01	1.8475
1995-10-01	0.9330
1996-01-01	2.7459
1996-04-01	-0.1839
1996-07-01	8.1218
1996-10-01	0.1424
1997-01-01	2.5263
1997-04-01	3.7171
1997-07-01	-3.1959
1997-10-01	0.0866
1998-01-01	1.7779
1998-04-01	-0.7823
1998-07-01	0.4000
1998-10-01	1.0502
1999-01-01	1.3392
1999-04-01	4.5328
1999-07-01	1.5015
1999-10-01	1.5139
2000-01-01	4.1627
2000-04-01	-0.5141
2000-07-01	1.8377
2000-10-01	-2.9364
2001-01-01	6.2048
2001-04-01	-4.1353
2001-07-01	1.8311
2001-10-01	-5.4667
2002-01-01	1.5307
2002-04-01	-5.3065
2002-07-01	-0.6156
2002-10-01	2.0750
2003-01-01	-7.1331
2003-04-01	-1.3920
2003-07-01	-3.0353
2003-10-01	0.5304
2004-01-01	2.5201
2004-04-01	0.8738
2004-07-01	2.7563
2004-10-01	0.2449
2005-01-01	3.5679
2005-04-01	-0.5665
2005-07-01	1.1242
2005-10-01	1.1375
2006-01-01	0.5972
2006-04-01	-2.0246
2006-07-01	-1.2941
2006-10-01	2.8628
2007-01-01	1.3115
2007-04-01	0.1116
2007-07-01	-1.8647
2007-10-01	3.0800
2008-01-01	-1.9986
2008-04-01	0.8375
2008-07-01	-0.5656
2008-10-01	-2.9987
2009-01-01	-1.8318
2009-04-01	-0.1569
2009-07-01	3.7466
2009-10-01	8.4373
2010-01-01	3.6784
2010-04-01	4.3652
2010-07-01	4.0804
2010-10-01	-2.4460
2011-01-01	2.4309
2011-04-01	5.2483
2011-07-01	5.8713
2011-10-01	4.3287
2012-01-01	7.8085
2012-04-01	3.1891
2012-07-01	7.7414
2012-10-01	6.5898
2013-01-01	3.7334
2013-04-01	3.0743
2013-07-01	10.7419
2013-10-01	10.4093
2014-01-01	5.8802
2014-04-01	9.4796
2014-07-01	3.7010
2014-10-01	6.0511
2015-01-01	7.6782
2015-04-01	10.8295