Quarter	Billions of US Dollars
1987-10-01	0.0085
1989-07-01	1.4000
1990-07-01	-0.0748
1991-07-01	0.0337
1992-10-01	-0.1094
1994-01-01	0.0057
1994-07-01	0.0010
1995-01-01	0.2444
1995-04-01	-0.0185
1995-07-01	0.2137
1995-10-01	0.0630
1996-01-01	0.1124
1996-04-01	0.0662
1996-07-01	0.3365
1996-10-01	0.3009
1997-01-01	0.4520
1997-04-01	0.0373
1997-07-01	0.1422
1997-10-01	-0.3780
1998-01-01	0.0097
1998-04-01	0.2368
1998-07-01	-0.1587
1998-10-01	0.1243
1999-01-01	-0.1083
1999-04-01	-0.0974
1999-07-01	-0.0266
1999-10-01	0.2447
2000-01-01	1.8060
2000-04-01	1.0086
2000-07-01	0.0121
2000-10-01	-0.3034
2001-01-01	2.8549
2001-04-01	-0.2041
2001-07-01	0.1463
2001-10-01	-0.4269
2002-01-01	1.4118
2002-04-01	-0.2638
2002-07-01	0.5793
2002-10-01	0.6358
2003-01-01	1.8771
2003-04-01	1.3772
2003-07-01	2.8735
2003-10-01	2.4281
2004-01-01	4.4463
2004-04-01	2.6781
2004-07-01	6.5352
2004-10-01	3.0152
2005-01-01	5.7094
2005-04-01	7.4026
2005-07-01	4.9975
2005-10-01	8.9019
2006-01-01	4.0342
2006-04-01	6.0453
2006-07-01	12.2152
2006-10-01	10.3438
2007-01-01	11.6467
2007-04-01	7.9839
2007-07-01	7.1248
2007-10-01	2.3755
2008-01-01	6.9234
2008-04-01	-1.0890
2008-07-01	-7.0093
2008-10-01	4.1549
2009-01-01	-6.5271
2009-04-01	7.6991
2009-07-01	12.8231
2009-10-01	8.9458
2010-01-01	16.9494
2010-04-01	-4.4989
2010-07-01	-42.3413
2010-10-01	-6.4523
2011-01-01	3.2078
2011-04-01	-5.1738
2011-07-01	-14.3620
2011-10-01	-2.8654
2012-01-01	-10.6810
2012-04-01	1.5386
2012-07-01	-25.1462
2012-10-01	2.9236
2013-01-01	-1.2561
2013-04-01	-9.6694
2013-07-01	-4.7881
2013-10-01	4.2212
2014-01-01	-1.8080
2014-04-01	0.4479
2014-07-01	-1.1364
2014-10-01	-2.7820
2015-01-01	-0.7054
2015-04-01	-0.4539