Quarter	Billions of US Dollars
1987-01-01	0.0668
1987-04-01	0.8226
1987-07-01	1.1191
1987-10-01	0.2351
1988-01-01	0.5218
1988-04-01	1.5821
1988-07-01	1.0682
1988-10-01	1.6342
1989-01-01	1.8765
1989-04-01	0.7351
1989-07-01	1.2066
1989-10-01	0.1575
1990-01-01	0.3518
1990-04-01	0.6408
1990-07-01	-0.2930
1990-10-01	-0.0349
1991-01-01	-0.0945
1991-04-01	-0.6336
1991-07-01	-0.2551
1991-10-01	-0.2014
1992-01-01	-0.6195
1992-04-01	-0.9044
1992-07-01	-0.6666
1992-10-01	0.1352
1993-01-01	-0.5052
1993-04-01	-0.5499
1993-07-01	10.9526
1993-10-01	-0.7681
1994-01-01	1.0818
1994-04-01	0.2641
1994-07-01	0.9208
1994-10-01	-1.3605
1995-01-01	1.6179
1995-04-01	0.9752
1995-07-01	1.7186
1995-10-01	1.4867
1996-01-01	5.3788
1996-04-01	4.8631
1996-07-01	4.9326
1996-10-01	0.1822
1997-01-01	3.6175
1997-04-01	1.2929
1997-07-01	2.3894
1997-10-01	-4.3659
1998-01-01	3.1270
1998-04-01	-3.2611
1998-07-01	4.0065
1998-10-01	-2.0486
1999-01-01	5.9103
1999-04-01	-5.2387
1999-07-01	4.8661
1999-10-01	3.4091
2000-01-01	1.7610
2000-04-01	2.4184
2000-07-01	2.0221
2000-10-01	3.8171
2001-01-01	0.1498
2001-04-01	1.1379
2001-07-01	1.0032
2001-10-01	1.2677
2002-01-01	0.6355
2002-04-01	5.2277
2002-07-01	1.3239
2002-10-01	2.2926
2003-01-01	4.0593
2003-04-01	9.5482
2003-07-01	4.3149
2003-10-01	13.8277
2004-01-01	9.7692
2004-04-01	4.2958
2004-07-01	13.6794
2004-10-01	5.7693
2005-01-01	1.8527
2005-04-01	10.6392
2005-07-01	0.7901
2005-10-01	5.9576
2006-01-01	19.2578
2006-04-01	10.6716
2006-07-01	9.2923
2006-10-01	10.6905
2007-01-01	-1.9566
2007-04-01	10.8317
2007-07-01	3.1021
2007-10-01	-6.5983
2008-01-01	41.8047
2008-04-01	9.2473
2008-07-01	-23.1702
2008-10-01	-29.2911
2009-01-01	-10.4180
2009-04-01	17.5623
2009-07-01	19.3836
2009-10-01	25.7396
2010-01-01	14.1417
2010-04-01	-3.0538
2010-07-01	8.0097
2010-10-01	-0.5555
2011-01-01	-4.7825
2011-04-01	7.0962
2011-07-01	-10.0466
2011-10-01	-10.9736
2012-01-01	16.0683
2012-04-01	1.4474
2012-07-01	13.8861
2012-10-01	-4.4545
2013-01-01	11.8162
2013-04-01	0.8212
2013-07-01	7.7528
2013-10-01	9.3042
2014-01-01	6.1705
2014-04-01	14.2073
2014-07-01	-5.0947
2014-10-01	2.2073
2015-01-01	-1.1164
2015-04-01	1.4476