Quarter	Billions of US Dollars
1971-01-01	0.0856
1971-04-01	0.0506
1971-07-01	0.0245
1971-10-01	0.0506
1972-01-01	0.1712
1972-04-01	0.0778
1972-07-01	0.1174
1972-10-01	0.2207
1973-01-01	0.0654
1973-04-01	0.2999
1973-07-01	0.0544
1973-10-01	0.4144
1974-01-01	0.1087
1974-04-01	0.4245
1974-07-01	0.0654
1974-10-01	0.0724
1975-01-01	0.1026
1975-04-01	0.3261
1975-07-01	0.1382
1975-10-01	0.1106
1976-01-01	0.1001
1976-04-01	0.2011
1976-07-01	0.0805
1976-10-01	0.2393
1977-01-01	0.2175
1977-04-01	0.1954
1977-07-01	0.1423
1977-10-01	0.2427
1978-01-01	0.3872
1978-04-01	0.4783
1978-07-01	0.3384
1978-10-01	0.4114
1979-01-01	0.1718
1979-04-01	0.1726
1979-07-01	0.0953
1979-10-01	-0.0355
1980-01-01	-0.0176
1980-04-01	-0.0433
1980-07-01	0.1095
1980-10-01	-0.0900
1981-01-01	0.0182
1981-04-01	-0.0752
1981-10-01	-0.0478
1982-01-01	-0.0208
1982-04-01	0.0556
1982-07-01	-0.0660
1982-10-01	0.0940
1983-01-01	0.1344
1983-04-01	0.0258
1983-07-01	-0.0198
1983-10-01	-0.0286
1984-01-01	0.0429
1984-04-01	0.2337
1984-07-01	0.1395
1984-10-01	0.3396
1985-01-01	0.0754
1985-04-01	0.6931
1985-07-01	-0.0239
1985-10-01	-1.0832
1986-01-01	-0.2088
1986-04-01	-0.0833
1986-07-01	0.0632
1986-10-01	-0.1993
1987-01-01	-0.2400
1987-04-01	-0.2149
1987-07-01	-0.3058
1987-10-01	-0.5092
1988-01-01	-0.1981
1988-04-01	-0.1762
1988-07-01	-0.0156
1988-10-01	0.0185
1989-01-01	-0.2301
1989-04-01	-0.2938
1989-07-01	-0.0294
1989-10-01	-0.0798
1990-01-01	-0.1816
1990-04-01	-0.7637
1990-07-01	-0.3385
1990-10-01	-0.3539
1991-01-01	-0.2460
1991-04-01	0.8349
1991-07-01	-0.1698
1991-10-01	0.1137
1992-01-01	2.4090
1992-04-01	0.1445
1992-07-01	-0.2550
1992-10-01	-0.2759
1993-01-01	-0.0661
1993-04-01	-0.7506
1993-07-01	-0.1490
1993-10-01	0.6951
1994-01-01	0.6836
1994-04-01	-0.3878
1994-07-01	-0.0900
1994-10-01	0.6563
1995-01-01	0.4080
1995-04-01	0.1607
1995-07-01	0.2763
1995-10-01	0.3998
1996-01-01	0.1536
1996-04-01	0.1427
1996-07-01	0.3500
1996-10-01	2.3167
1997-01-01	-0.0450
1997-04-01	0.7157
1997-07-01	1.1195
1997-10-01	0.4265
1998-01-01	1.7429
1998-04-01	0.3811
1998-07-01	0.3512
1998-10-01	0.2562
1999-01-01	0.6997
1999-04-01	2.6154
1999-07-01	0.2197
1999-10-01	0.1965
2000-01-01	1.3190
2000-04-01	1.8691
2000-07-01	0.8681
2000-10-01	-0.1255
2001-01-01	0.4507
2001-04-01	0.9578
2001-07-01	1.9588
2001-10-01	-0.0367
2002-01-01	0.6343
2002-04-01	1.6374
2002-07-01	0.6282
2002-10-01	-0.3183
2003-01-01	0.3738
2003-04-01	2.2021
2003-07-01	0.4746
2003-10-01	0.1460
2004-01-01	2.3511
2004-04-01	2.5105
2004-07-01	-0.2725
2004-10-01	2.2970
2005-01-01	1.1576
2005-04-01	3.1866
2005-07-01	4.1586
2005-10-01	2.9625
2006-01-01	9.5636
2006-04-01	5.9127
2006-07-01	2.2255
2006-10-01	12.6418
2007-01-01	3.8276
2007-04-01	8.8786
2007-07-01	5.4001
2007-10-01	7.0375
2008-01-01	-0.5575
2008-04-01	7.8110
2008-07-01	0.6525
2008-10-01	-0.7611
2009-01-01	-0.6877
2009-04-01	8.2171
2009-07-01	9.4234
2009-10-01	2.3310
2010-01-01	3.0832
2010-04-01	2.1632
2010-07-01	4.9916
2010-10-01	5.2884
2011-01-01	5.8050
2011-04-01	-1.1775
2011-07-01	-1.3614
2011-10-01	12.7472
2012-01-01	3.1813
2012-04-01	-1.9439
2012-07-01	7.0305
2012-10-01	13.0169
2013-01-01	4.3509
2013-04-01	2.0806
2013-07-01	5.8237
2013-10-01	5.3524
2014-01-01	4.4973
2014-04-01	10.9820
2014-07-01	5.3421
2014-10-01	10.2311
2015-01-01	5.2887
2015-04-01	12.8151