Quarter	Billions of US Dollars
1987-01-01	0.2732
1987-04-01	1.5589
1987-07-01	2.2027
1987-10-01	0.9372
1988-01-01	1.2561
1988-04-01	0.6500
1988-07-01	1.2115
1988-10-01	0.9573
1989-01-01	3.3338
1989-04-01	2.8775
1989-07-01	1.1085
1989-10-01	1.1637
1990-01-01	1.1440
1990-04-01	0.1545
1990-07-01	3.2588
1990-10-01	0.4355
1991-01-01	0.0324
1991-04-01	0.1184
1991-07-01	0.1568
1991-10-01	0.0512
1992-01-01	-0.6405
1992-04-01	0.0671
1992-07-01	-2.1217
1992-10-01	0.8455
1993-01-01	-0.9115
1993-04-01	-0.0634
1993-07-01	-1.9733
1993-10-01	0.8550
1994-01-01	-1.6503
1994-04-01	-0.7309
1994-07-01	-0.8625
1994-10-01	0.5125
1995-01-01	0.2508
1995-04-01	-0.0956
1995-07-01	-3.7798
1995-10-01	-0.2328
1996-01-01	-0.0006
1996-04-01	0.2580
1996-07-01	0.2552
1996-10-01	-0.8167
1997-01-01	0.0889
1997-04-01	0.0559
1997-07-01	-0.6356
1997-10-01	-1.1205
1998-01-01	0.3102
1998-04-01	-0.3197
1998-07-01	0.7254
1998-10-01	-0.2365
1999-01-01	0.6867
1999-04-01	0.2697
1999-07-01	-0.1876
1999-10-01	-0.5967
2000-01-01	1.1210
2000-04-01	1.0895
2000-07-01	0.9291
2000-10-01	0.8061
2001-01-01	-0.6518
2001-04-01	1.2859
2001-07-01	-0.2225
2001-10-01	1.9595
2002-01-01	0.1205
2002-04-01	0.5399
2002-07-01	0.4090
2002-10-01	0.2078
2003-01-01	1.0142
2003-04-01	1.1931
2003-07-01	1.1261
2003-10-01	0.0857
2004-01-01	-0.2588
2004-04-01	1.5667
2004-07-01	2.4382
2004-10-01	1.0237
2005-01-01	3.2249
2005-04-01	0.8358
2005-07-01	4.3844
2005-10-01	1.6805
2006-01-01	3.9470
2006-04-01	0.3504
2006-07-01	3.4682
2006-10-01	-1.0610
2007-01-01	1.8746
2007-04-01	1.7223
2007-07-01	-0.3330
2007-10-01	1.5011
2008-01-01	-0.2876
2008-04-01	1.0359
2008-07-01	-1.8618
2008-10-01	-0.6627
2009-01-01	0.0156
2009-04-01	-0.3446
2009-07-01	1.1221
2009-10-01	-2.7360
2010-01-01	4.3311
2010-04-01	-4.8073
2010-07-01	4.2878
2010-10-01	0.5792
2011-01-01	0.9954
2011-04-01	-1.2500
2011-07-01	0.9653
2011-10-01	0.8620
2012-01-01	6.3197
2012-04-01	-2.0162
2012-07-01	6.8100
2012-10-01	3.0861
2013-01-01	8.1598
2013-04-01	1.2678
2013-07-01	11.5014
2013-10-01	4.4991
2014-01-01	8.6923
2014-04-01	9.4709
2014-07-01	10.0570
2014-10-01	1.0862
2015-01-01	10.6073
2015-04-01	-0.2130