Quarter	Billions of US Dollars
1987-01-01	0.3313
1987-04-01	0.3396
1987-07-01	-0.0609
1987-10-01	0.2095
1988-01-01	0.7693
1988-04-01	0.8305
1988-07-01	0.1701
1988-10-01	0.1973
1989-01-01	1.4674
1989-04-01	0.1653
1989-07-01	0.4551
1989-10-01	0.5632
1990-01-01	0.4288
1990-04-01	0.2593
1990-07-01	0.7862
1990-10-01	0.4529
1991-01-01	0.0183
1991-04-01	0.6726
1991-07-01	0.2716
1991-10-01	0.1383
1992-01-01	0.2915
1992-04-01	1.4583
1992-07-01	0.9374
1992-10-01	-0.1822
1993-01-01	-0.2273
1993-04-01	0.2042
1993-07-01	5.1172
1993-10-01	2.4538
1994-01-01	0.9877
1994-04-01	2.2955
1994-07-01	1.8766
1994-10-01	1.6725
1995-01-01	0.2100
1995-04-01	0.6577
1995-07-01	4.2620
1995-10-01	2.7856
1996-01-01	1.1542
1996-04-01	2.4337
1996-07-01	1.4098
1996-10-01	2.6650
1997-01-01	2.9970
1997-04-01	4.3499
1997-07-01	1.7129
1997-10-01	3.6986
1998-01-01	1.5157
1998-04-01	2.9758
1998-07-01	-0.8673
1998-10-01	1.5495
1999-01-01	3.1701
1999-04-01	5.8685
1999-07-01	5.9877
1999-10-01	2.9203
2000-01-01	5.5577
2000-04-01	7.7398
2000-07-01	5.1712
2000-10-01	4.8662
2001-01-01	6.1845
2001-04-01	-0.1762
2001-07-01	6.8189
2001-10-01	7.8130
2002-01-01	-1.2906
2002-04-01	2.0738
2002-07-01	-2.9361
2002-10-01	-5.5147
2003-01-01	-5.6139
2003-04-01	2.0559
2003-07-01	-2.4898
2003-10-01	9.7460
2004-01-01	3.6140
2004-04-01	11.4135
2004-07-01	13.5075
2004-10-01	14.0834
2005-01-01	16.4848
2005-04-01	14.1642
2005-07-01	-5.7040
2005-10-01	17.1731
2006-01-01	17.3560
2006-04-01	23.0803
2006-07-01	11.0226
2006-10-01	24.8961
2007-01-01	22.0851
2007-04-01	23.7912
2007-07-01	9.3117
2007-10-01	20.8514
2008-01-01	26.2268
2008-04-01	41.9663
2008-07-01	6.2529
2008-10-01	11.0351
2009-01-01	8.8414
2009-04-01	-0.1644
2009-07-01	5.3274
2009-10-01	-1.1791
2010-01-01	-4.8472
2010-04-01	-12.6597
2010-07-01	30.2213
2010-10-01	-12.0420
2011-01-01	20.1957
2011-04-01	14.6608
2011-07-01	-2.2939
2011-10-01	-3.2467
2012-01-01	-10.9124
2012-04-01	-23.1518
2012-07-01	-6.2408
2012-10-01	-3.3031
2013-01-01	-18.5910
2013-04-01	-1.7571
2013-07-01	0.8014
2013-10-01	-2.2033
2014-01-01	-10.2627
2014-04-01	-9.5108
2014-07-01	-26.9786
2014-10-01	-6.1132
2015-01-01	-2.0965
2015-04-01	-4.2245