Quarter	Billions of US Dollars
1971-01-01	0.0300
1971-04-01	0.0353
1971-10-01	0.0250
1972-01-01	0.0748
1972-04-01	0.0315
1972-07-01	0.1014
1972-10-01	0.0406
1974-04-01	0.0172
1974-07-01	0.0751
1974-10-01	0.0250
1975-01-01	0.2094
1975-04-01	0.2706
1975-10-01	0.0875
1976-01-01	0.0931
1976-04-01	0.2828
1976-07-01	0.4003
1976-10-01	0.2800
1977-01-01	0.0680
1977-04-01	0.0610
1977-07-01	0.4348
1977-10-01	0.3561
1978-01-01	0.5844
1978-04-01	0.2500
1978-07-01	0.3708
1978-10-01	0.2613
1979-01-01	0.2682
1979-04-01	0.0508
1979-07-01	0.0130
1979-10-01	0.1537
1980-01-01	0.2250
1980-04-01	-0.1050
1980-07-01	0.0230
1980-10-01	0.0300
1981-01-01	0.0897
1981-04-01	0.0530
1981-07-01	0.0824
1981-10-01	0.3274
1982-01-01	0.0584
1982-04-01	0.1670
1982-07-01	0.8295
1982-10-01	0.3015
1983-01-01	0.2215
1983-04-01	0.0652
1983-07-01	0.4926
1983-10-01	0.6924
1984-01-01	0.7208
1984-04-01	0.7835
1984-07-01	0.5066
1984-10-01	0.7782
1985-01-01	0.7941
1985-04-01	1.0446
1985-07-01	1.4367
1985-10-01	1.3325
1986-01-01	2.0756
1986-04-01	1.5834
1986-07-01	1.2163
1986-10-01	2.6074
1987-01-01	1.2283
1987-04-01	1.5146
1987-07-01	1.3084
1987-10-01	0.2627
1988-01-01	0.6150
1988-04-01	1.0756
1988-07-01	1.2826
1988-10-01	2.0676
1989-01-01	2.6045
1989-04-01	1.1419
1989-07-01	1.2939
1989-10-01	-0.4493
1990-01-01	0.1736
1990-04-01	-0.2292
1990-07-01	0.5667
1990-10-01	-0.6733
1991-01-01	-0.4317
1991-04-01	-1.0208
1991-07-01	0.2645
1991-10-01	-0.6501
1992-01-01	-0.3349
1992-04-01	-1.5579
1992-07-01	-1.2011
1992-10-01	-0.8260
1993-01-01	-1.1789
1993-04-01	-0.3492
1993-07-01	-0.0612
1993-10-01	0.8035
1994-01-01	1.1268
1994-04-01	1.8857
1994-07-01	3.4182
1994-10-01	3.2358
1995-01-01	2.3278
1995-04-01	-0.8292
1995-07-01	2.1342
1995-10-01	2.2588
1996-01-01	0.8573
1996-04-01	2.4933
1996-07-01	2.4289
1996-10-01	3.5731
1997-01-01	2.6396
1997-04-01	2.7951
1997-07-01	-1.1291
1997-10-01	-1.5516
1998-01-01	-0.1007
1998-04-01	3.1696
1998-07-01	-0.0095
1998-10-01	-1.0142
1999-01-01	1.9062
1999-04-01	1.4588
1999-07-01	3.5020
1999-10-01	0.6503
2000-01-01	3.5840
2000-04-01	7.5659
2000-07-01	1.2210
2000-10-01	-1.1373
2001-01-01	2.1134
2001-04-01	6.7463
2001-07-01	3.9592
2001-10-01	0.2906
2002-01-01	0.6810
2002-04-01	3.0889
2002-07-01	3.1558
2002-10-01	4.4481
2003-01-01	3.0680
2003-04-01	9.8354
2003-07-01	10.8601
2003-10-01	6.9253
2004-01-01	15.8996
2004-04-01	10.8885
2004-07-01	18.5467
2004-10-01	9.1182
2005-01-01	14.2692
2005-04-01	14.7297
2005-07-01	0.9648
2005-10-01	13.4095
2006-01-01	20.1458
2006-04-01	11.8702
2006-07-01	14.1039
2006-10-01	25.8113
2007-01-01	21.6745
2007-04-01	18.7065
2007-07-01	15.1445
2007-10-01	2.9950
2008-01-01	24.2971
2008-04-01	1.4700
2008-07-01	2.3353
2008-10-01	6.9640
2009-01-01	-9.8271
2009-04-01	15.3941
2009-07-01	15.0823
2009-10-01	36.2008
2010-01-01	18.1646
2010-04-01	-2.8466
2010-07-01	15.1654
2010-10-01	4.0870
2011-01-01	0.7227
2011-04-01	10.2940
2011-07-01	-0.7330
2011-10-01	-4.1593
2012-01-01	16.9221
2012-04-01	-4.9789
2012-07-01	36.0426
2012-10-01	-8.5447
2013-01-01	11.0095
2013-04-01	4.0495
2013-07-01	5.3414
2013-10-01	17.3051
2014-01-01	6.4384
2014-04-01	8.2030
2014-07-01	3.2671
2014-10-01	5.6762
2015-01-01	10.0534
2015-04-01	12.1335