Quarter	Billions of US Dollars
1987-01-01	0.4675
1987-04-01	-0.0198
1987-07-01	0.0881
1987-10-01	0.3598
1988-01-01	0.6321
1988-04-01	0.2813
1988-07-01	0.3018
1988-10-01	0.3233
1989-01-01	0.3062
1989-04-01	0.1022
1989-07-01	0.3424
1989-10-01	0.1051
1990-01-01	0.1259
1990-04-01	0.6260
1990-07-01	0.2240
1990-10-01	0.6087
1991-01-01	1.0658
1991-04-01	0.1064
1991-07-01	0.0713
1991-10-01	1.4289
1992-01-01	0.3008
1992-04-01	0.2214
1992-07-01	0.2700
1992-10-01	0.2148
1993-01-01	0.8852
1993-04-01	1.5961
1993-07-01	2.2774
1993-10-01	1.8610
1994-01-01	1.7163
1994-04-01	1.7043
1994-07-01	1.6239
1994-10-01	1.0193
1995-01-01	-0.5722
1995-04-01	0.7863
1995-07-01	2.3998
1995-10-01	0.7361
1996-01-01	-0.3155
1996-04-01	1.7403
1996-07-01	2.4784
1996-10-01	0.8577
1997-01-01	1.2190
1997-04-01	3.3557
1997-07-01	2.8634
1997-10-01	-0.5930
1998-01-01	0.1282
1998-04-01	0.8566
1998-07-01	0.1937
1998-10-01	-0.6496
1999-01-01	-1.8094
1999-04-01	-1.3024
1999-07-01	-1.2017
1999-10-01	-0.7583
2000-01-01	-0.6682
2000-04-01	-0.7477
2000-07-01	-2.2709
2000-10-01	0.9617
2001-01-01	-0.8664
2001-04-01	-0.3610
2001-07-01	-0.6085
2001-10-01	0.2432
2002-01-01	-1.2089
2002-04-01	4.7617
2002-07-01	1.2045
2002-10-01	2.9318
2003-01-01	-0.2955
2003-04-01	-0.1524
2003-07-01	0.9111
2003-10-01	0.4650
2004-01-01	-2.3200
2004-04-01	0.8616
2004-07-01	0.0316
2004-10-01	2.3577
2005-01-01	1.1332
2005-04-01	3.4129
2005-07-01	0.3389
2005-10-01	-0.4797
2006-01-01	8.0676
2006-04-01	0.8315
2006-07-01	1.2968
2006-10-01	12.5679
2007-01-01	2.9456
2007-04-01	4.1673
2007-07-01	1.8889
2007-10-01	1.6684
2008-01-01	-2.0895
2008-04-01	5.1549
2008-07-01	0.8208
2008-10-01	-1.4164
2009-01-01	-0.9505
2009-04-01	-3.0414
2009-07-01	5.0985
2009-10-01	0.0993
2010-01-01	0.8942
2010-04-01	-0.2634
2010-07-01	7.7109
2010-10-01	-0.4367
2011-01-01	4.7643
2011-04-01	3.3669
2011-07-01	0.2349
2011-10-01	0.0934
2012-01-01	4.1445
2012-04-01	1.6802
2012-07-01	2.9277
2012-10-01	12.9859
2013-01-01	1.1707
2013-04-01	8.8784
2013-07-01	3.5186
2013-10-01	3.0919
2014-01-01	5.0238
2014-04-01	7.0933
2014-07-01	3.0607
2014-10-01	3.5086
2015-01-01	5.3782
2015-04-01	12.6925