Quarter	Billions of US Dollars
1987-01-01	0.2574
1987-04-01	0.6092
1987-07-01	0.4475
1987-10-01	0.0095
1988-01-01	0.4630
1988-04-01	0.2383
1988-07-01	0.4433
1988-10-01	0.5155
1989-01-01	0.7257
1989-04-01	-0.0202
1989-07-01	0.3435
1989-10-01	0.4117
1990-01-01	0.1046
1990-04-01	0.1405
1990-07-01	0.6274
1990-10-01	0.1602
1991-01-01	-0.1318
1991-04-01	0.0002
1991-07-01	0.1706
1991-10-01	-0.2651
1992-01-01	0.2304
1992-04-01	-0.6851
1992-07-01	0.4783
1992-10-01	-0.3493
1993-01-01	-0.4063
1993-04-01	0.5816
1993-07-01	4.0419
1993-10-01	0.8193
1994-01-01	0.4214
1994-04-01	0.3370
1994-07-01	0.7792
1994-10-01	0.2341
1995-01-01	0.7376
1995-04-01	-0.2860
1995-07-01	0.8318
1995-10-01	0.5808
1996-01-01	-1.3268
1996-04-01	-1.0790
1996-07-01	1.2292
1996-10-01	0.5385
1997-01-01	0.4836
1997-04-01	-0.4081
1997-07-01	0.0848
1997-10-01	-0.7858
1998-01-01	-0.2273
1998-04-01	1.2029
1998-07-01	-0.2117
1998-10-01	0.0239
1999-01-01	-1.2279
1999-04-01	1.1275
1999-07-01	2.7885
1999-10-01	0.7842
2000-01-01	1.8658
2000-04-01	1.9097
2000-07-01	1.2351
2000-10-01	-2.3448
2001-01-01	2.0800
2001-04-01	3.3156
2001-07-01	1.6825
2001-10-01	-0.2219
2002-01-01	2.5021
2002-04-01	0.4128
2002-07-01	2.1491
2002-10-01	2.4487
2003-01-01	1.5762
2003-04-01	2.4201
2003-07-01	5.5415
2003-10-01	3.1380
2004-01-01	8.8508
2004-04-01	2.9328
2004-07-01	7.2299
2004-10-01	4.4634
2005-01-01	5.1712
2005-04-01	5.7680
2005-07-01	2.1454
2005-10-01	4.5271
2006-01-01	7.9508
2006-04-01	6.2307
2006-07-01	8.8462
2006-10-01	12.1577
2007-01-01	20.4055
2007-04-01	15.8545
2007-07-01	3.8315
2007-10-01	-1.3730
2008-01-01	0.2644
2008-04-01	-3.9990
2008-07-01	2.6079
2008-10-01	-0.6455
2009-01-01	-0.6411
2009-04-01	1.8974
2009-07-01	2.7177
2009-10-01	4.3640
2010-01-01	0.3888
2010-04-01	0.9058
2010-07-01	2.9020
2010-10-01	2.9701
2011-01-01	2.1172
2011-04-01	3.9610
2011-07-01	1.3172
2011-10-01	3.7143
2012-01-01	2.7835
2012-04-01	-0.3055
2012-07-01	11.8939
2012-10-01	0.5028
2013-01-01	-3.3300
2013-04-01	5.6359
2013-07-01	-0.5365
2013-10-01	1.8627
2014-01-01	0.2787
2014-04-01	1.1097
2014-07-01	2.5021
2014-10-01	-1.7006
2015-01-01	-0.5008
2015-04-01	4.9639