Quarter	Billions of US Dollars
1987-01-01	0.1140
1987-04-01	0.1696
1987-10-01	-0.0250
1988-01-01	0.1805
1988-07-01	0.1496
1989-01-01	0.4865
1989-04-01	0.1527
1989-10-01	0.3000
1990-07-01	0.5375
1991-01-01	0.6859
1991-04-01	0.3454
1991-07-01	-0.0474
1991-10-01	0.3383
1992-01-01	0.5469
1992-04-01	0.4969
1992-07-01	0.4065
1992-10-01	0.6129
1993-01-01	1.0587
1993-04-01	0.7606
1993-07-01	0.1788
1993-10-01	1.4345
1994-01-01	-0.3018
1994-04-01	-0.0123
1994-07-01	-0.0762
1995-04-01	-0.4656
1995-07-01	-0.2011
1995-10-01	-0.3942
1996-01-01	-0.3521
1996-04-01	-0.5482
1996-10-01	-0.3000
1997-01-01	-0.1790
1997-04-01	-0.5478
1997-07-01	-0.9327
1997-10-01	-0.4233
1998-04-01	-0.5575
1998-07-01	-0.4823
1998-10-01	-1.0007
1999-01-01	-0.8383
1999-04-01	-0.1654
1999-10-01	0.1817
2000-01-01	-0.2852
2000-04-01	0.3451
2000-07-01	0.0100
2000-10-01	-0.4553
2001-01-01	-0.0100
2001-04-01	0.2682
2001-07-01	0.4450
2001-10-01	-0.4619
2002-01-01	0.2559
2002-04-01	0.9689
2002-07-01	0.0792
2002-10-01	0.2147
2003-01-01	-0.7182
2003-04-01	2.1143
2003-07-01	1.7036
2003-10-01	1.7886
2004-01-01	3.4222
2004-04-01	1.9430
2004-07-01	3.2849
2004-10-01	2.3710
2005-01-01	4.0653
2005-04-01	1.0634
2005-07-01	1.1335
2005-10-01	1.7206
2006-01-01	2.9895
2006-04-01	1.1381
2006-07-01	3.7380
2006-10-01	5.2346
2007-01-01	8.6628
2007-04-01	3.6094
2007-07-01	-0.5292
2007-10-01	4.4272
2008-01-01	4.2861
2008-04-01	6.2114
2008-07-01	-1.8447
2008-10-01	-3.4506
2009-01-01	-2.7664
2009-04-01	-1.2729
2009-07-01	-0.4737
2009-10-01	-3.1606
2010-01-01	8.4296
2010-04-01	41.0468
2010-07-01	5.6490
2010-10-01	26.9586
2011-01-01	-1.7338
2011-04-01	6.4593
2011-07-01	-4.7172
2011-10-01	11.5610
2012-01-01	-4.6052
2012-04-01	-8.0796
2012-07-01	-18.3827
2012-10-01	-1.6044
2013-01-01	-4.6793
2013-04-01	-2.9219
2013-07-01	-6.6947
2013-10-01	-0.8140
2014-01-01	-0.6389
2014-04-01	-6.0739
2014-07-01	-4.2421
2014-10-01	2.9027
2015-01-01	-1.1520
2015-04-01	10.0845