Quarter	Billions of US Dollars
1987-01-01	0.1343
1987-04-01	0.1481
1987-07-01	0.1286
1987-10-01	0.0251
1988-01-01	-0.0962
1988-04-01	0.3839
1988-07-01	0.0040
1988-10-01	0.7340
1989-01-01	0.2042
1989-04-01	-0.1457
1989-07-01	0.1679
1989-10-01	0.0046
1990-01-01	0.4101
1990-04-01	-0.3486
1990-07-01	0.3439
1990-10-01	0.6408
1991-01-01	0.4388
1991-04-01	1.7498
1991-07-01	0.9450
1991-10-01	0.0487
1992-01-01	0.7651
1992-04-01	-0.0935
1992-07-01	-0.0706
1992-10-01	0.4513
1993-01-01	0.5057
1993-04-01	1.0792
1993-07-01	0.6050
1993-10-01	0.1663
1994-01-01	0.8859
1994-04-01	-0.3991
1994-07-01	0.6240
1994-10-01	1.6654
1995-01-01	0.6705
1995-04-01	0.2498
1995-07-01	0.8189
1995-10-01	-0.0718
1996-01-01	0.1965
1996-04-01	0.3467
1996-07-01	-0.6367
1996-10-01	-0.8185
1997-01-01	1.3060
1997-04-01	1.2183
1997-07-01	2.7206
1997-10-01	3.8862
1998-01-01	0.3792
1998-04-01	2.0846
1998-07-01	1.4215
1998-10-01	-0.7703
1999-01-01	1.7810
1999-04-01	1.0069
1999-07-01	1.6348
1999-10-01	-0.2216
2000-01-01	0.4338
2000-04-01	2.9706
2000-07-01	-0.9250
2000-10-01	6.3381
2001-01-01	0.7397
2001-04-01	5.3679
2001-07-01	2.6748
2001-10-01	2.3165
2002-01-01	0.4653
2002-04-01	3.3416
2002-07-01	-0.3366
2002-10-01	1.6489
2003-01-01	1.1732
2003-04-01	0.1452
2003-07-01	2.8042
2003-10-01	4.7654
2004-01-01	-0.3579
2004-04-01	2.0741
2004-07-01	2.3992
2004-10-01	-0.9979
2005-01-01	-1.5550
2005-04-01	-0.0967
2005-07-01	2.3424
2005-10-01	-1.1475
2006-01-01	1.5525
2006-04-01	10.2680
2006-07-01	-0.6710
2006-10-01	6.2154
2007-01-01	0.5221
2007-04-01	11.2991
2007-07-01	4.6552
2007-10-01	1.9180
2008-01-01	1.6920
2008-04-01	7.5695
2008-07-01	-0.6665
2008-10-01	-1.4457
2009-01-01	29.3710
2009-04-01	10.1374
2009-07-01	-1.4338
2009-10-01	-1.9312
2010-01-01	1.1106
2010-04-01	-1.6048
2010-07-01	-0.3037
2010-10-01	-5.2370
2011-01-01	1.9047
2011-04-01	-2.2556
2011-07-01	-0.2841
2011-10-01	1.0906
2012-01-01	1.9379
2012-04-01	1.2463
2012-07-01	3.1440
2012-10-01	11.3802
2013-01-01	-10.2413
2013-04-01	-3.2656
2013-07-01	-0.5336
2013-10-01	-3.1991
2014-01-01	-1.1222
2014-04-01	6.0793
2014-07-01	-2.6062
2014-10-01	-6.3808
2015-01-01	8.2183
2015-04-01	2.2256