Quarter	Billions of US Dollars
1971-10-01	0.0150
1973-07-01	0.0766
1974-01-01	0.0500
1975-01-01	0.0244
1977-04-01	0.1069
1977-07-01	0.0214
1978-07-01	-0.0477
1981-10-01	0.0550
1982-07-01	0.0232
1982-10-01	0.0400
1983-10-01	0.0500
1984-07-01	-0.0128
1984-10-01	0.0750
1985-01-01	0.0359
1985-04-01	-0.0643
1985-07-01	-0.0500
1985-10-01	0.0245
1986-04-01	-0.0360
1986-07-01	0.0944
1986-10-01	0.0265
1987-04-01	0.2140
1988-01-01	0.1556
1988-04-01	0.0061
1988-07-01	-0.0245
1989-04-01	0.1284
1989-10-01	-0.0500
1990-04-01	0.1167
1991-01-01	-0.0670
1991-04-01	0.2740
1991-07-01	0.1551
1991-10-01	-0.0850
1992-04-01	0.0244
1992-07-01	-0.0074
1992-10-01	0.0017
1993-01-01	0.0017
1993-04-01	0.1589
1993-07-01	1.1017
1993-10-01	2.7064
1994-01-01	1.9374
1994-04-01	0.7350
1994-07-01	0.9489
1994-10-01	2.1612
1995-01-01	-0.0235
1995-04-01	-0.1884
1995-07-01	-0.0433
1995-10-01	0.8683
1996-01-01	1.9657
1996-04-01	-0.9546
1996-07-01	0.9212
1996-10-01	0.6065
1997-01-01	1.5092
1997-04-01	1.9661
1997-07-01	3.7179
1997-10-01	-0.0569
1998-01-01	0.1470
1998-04-01	0.0276
1998-07-01	-0.7305
1998-10-01	-0.8241
1999-01-01	2.9261
1999-04-01	0.4382
1999-07-01	0.8421
1999-10-01	-0.3938
2000-01-01	0.9189
2000-04-01	-0.6036
2000-07-01	4.4521
2000-10-01	0.1288
2001-01-01	3.4044
2001-04-01	3.5822
2001-07-01	-0.0845
2001-10-01	1.1578
2002-01-01	1.4289
2002-04-01	0.6423
2002-07-01	-0.1267
2002-10-01	-0.1447
2003-01-01	1.9805
2003-04-01	1.5966
2003-07-01	-0.3993
2003-10-01	4.6488
2004-01-01	-0.5863
2004-04-01	-0.3631
2004-07-01	1.5864
2004-10-01	1.4768
2005-01-01	1.5391
2005-04-01	2.2377
2005-07-01	2.1348
2005-10-01	0.5924
2006-01-01	-0.2094
2006-04-01	1.1257
2006-07-01	0.9604
2006-10-01	3.2275
2007-01-01	0.7031
2007-04-01	3.5093
2007-07-01	-1.1688
2007-10-01	0.4176
2008-01-01	-0.3859
2008-04-01	2.2064
2008-07-01	1.4892
2008-10-01	-1.6924
2009-01-01	-1.2138
2009-04-01	2.5530
2009-07-01	5.6813
2009-10-01	3.5229
2010-01-01	0.7755
2010-04-01	-0.1518
2010-07-01	4.0664
2010-10-01	2.5041
2011-01-01	-3.2258
2011-04-01	2.5208
2011-07-01	-0.6267
2011-10-01	0.7855
2012-01-01	11.9118
2012-04-01	7.8891
2012-07-01	3.0160
2012-10-01	4.1091
2013-01-01	1.2491
2013-04-01	4.4933
2013-07-01	-2.1357
2013-10-01	0.4696
2014-01-01	3.3045
2014-04-01	0.9484
2014-07-01	2.3731
2014-10-01	5.1684
2015-01-01	1.3616
2015-04-01	1.2720