Quarter	Billions of US Dollars
1972-07-01	0.0158
1973-01-01	0.0307
1973-04-01	0.0200
1973-07-01	0.0162
1976-10-01	0.0576
1977-01-01	0.1464
1977-04-01	0.1798
1978-07-01	0.1503
1979-07-01	0.1046
1980-01-01	-0.0134
1980-04-01	0.0530
1980-07-01	-0.0035
1980-10-01	0.0114
1981-01-01	0.0144
1981-10-01	0.0412
1982-01-01	0.1067
1982-04-01	-0.0097
1982-07-01	0.0008
1982-10-01	0.0751
1983-04-01	0.0102
1983-07-01	-0.0541
1983-10-01	0.0555
1984-01-01	-0.1320
1984-04-01	0.1109
1984-07-01	0.0098
1984-10-01	0.0339
1985-04-01	-0.0105
1985-07-01	-0.0204
1985-10-01	0.0389
1986-04-01	0.0056
1986-07-01	-0.0589
1986-10-01	0.0050
1987-01-01	-0.0164
1987-04-01	-0.1317
1987-07-01	-0.0131
1987-10-01	-0.0070
1988-01-01	-0.0385
1988-04-01	-0.0084
1988-07-01	-0.0625
1988-10-01	-0.1941
1989-01-01	-0.0342
1989-07-01	-0.0115
1989-10-01	0.2098
1990-04-01	0.0192
1990-07-01	0.0086
1990-10-01	0.0098
1991-01-01	-0.0100
1991-04-01	-0.1042
1991-07-01	0.0601
1991-10-01	0.0076
1992-01-01	0.1593
1992-04-01	0.0295
1992-07-01	0.0462
1992-10-01	0.0842
1993-01-01	0.0764
1993-04-01	0.1202
1993-07-01	0.1196
1993-10-01	-0.0097
1994-04-01	0.1952
1994-07-01	0.1091
1994-10-01	0.2216
1995-01-01	0.9200
1995-04-01	0.1231
1995-07-01	0.2369
1995-10-01	0.3665
1996-01-01	0.1860
1996-04-01	1.4767
1996-07-01	0.6434
1996-10-01	0.3535
1997-01-01	-0.0167
1997-04-01	0.0551
1997-07-01	0.2929
1997-10-01	0.5896
1998-01-01	0.1076
1998-04-01	-0.0857
1998-07-01	-0.1247
1998-10-01	-0.3353
1999-01-01	0.1478
1999-04-01	0.0700
1999-07-01	-0.1692
1999-10-01	0.3010
2000-01-01	0.4624
2000-04-01	0.8975
2000-07-01	0.1835
2000-10-01	1.8546
2001-01-01	1.2440
2001-04-01	1.1564
2001-07-01	2.1432
2001-10-01	3.9932
2002-01-01	1.3754
2002-04-01	3.4952
2002-07-01	0.7861
2002-10-01	2.4730
2003-01-01	0.9963
2003-04-01	0.6303
2003-07-01	2.3927
2003-10-01	5.3855
2004-01-01	1.2731
2004-04-01	3.9205
2004-07-01	0.6209
2004-10-01	2.6715
2005-01-01	1.7376
2005-04-01	2.7711
2005-07-01	4.1509
2005-10-01	4.7898
2006-01-01	2.8828
2006-04-01	3.9290
2006-07-01	8.8930
2006-10-01	1.1111
2007-01-01	-5.3312
2007-04-01	-1.3863
2007-07-01	1.5357
2007-10-01	-0.8373
2008-01-01	0.3673
2008-04-01	3.3036
2008-07-01	-0.8055
2008-10-01	4.6520
2009-01-01	-4.4324
2009-04-01	3.6168
2009-07-01	-1.4952
2009-10-01	-0.8145
2010-01-01	-1.6826
2010-04-01	-1.3941
2010-07-01	0.9174
2010-10-01	-0.3227
2011-01-01	2.2521
2011-04-01	-0.5343
2011-07-01	-2.0750
2011-10-01	1.4551
2012-01-01	3.3438
2012-04-01	-2.4375
2012-07-01	-3.7769
2012-10-01	-1.5224
2013-01-01	5.1155
2013-04-01	7.9153
2013-07-01	3.8311
2013-10-01	4.1330
2014-01-01	8.4539
2014-04-01	0.9808
2014-07-01	6.0429
2014-10-01	3.2893
2015-01-01	6.8929
2015-04-01	11.3402