Quarter	Billions of US Dollars
1987-01-01	1.0979
1987-04-01	1.8233
1987-07-01	0.4410
1987-10-01	-0.1939
1988-01-01	1.6455
1988-04-01	1.9986
1988-07-01	1.1526
1988-10-01	2.5737
1989-01-01	1.2262
1989-04-01	3.0312
1989-07-01	0.1356
1989-10-01	1.5940
1990-01-01	3.2352
1990-04-01	1.2408
1990-07-01	1.1995
1990-10-01	1.5264
1991-01-01	2.7664
1991-04-01	1.4507
1991-07-01	1.6875
1991-10-01	1.3815
1992-01-01	2.7880
1992-04-01	0.7989
1992-07-01	0.8631
1992-10-01	0.6251
1993-01-01	2.4266
1993-04-01	1.5815
1993-07-01	6.7283
1993-10-01	1.4695
1994-01-01	1.9109
1994-04-01	1.4547
1994-07-01	1.3682
1994-10-01	-0.0050
1995-01-01	2.0188
1995-04-01	5.3259
1995-07-01	2.6159
1995-10-01	3.0296
1996-01-01	7.3620
1996-04-01	5.0469
1996-07-01	3.4532
1996-10-01	3.1817
1997-01-01	11.2093
1997-04-01	6.8386
1997-07-01	7.6340
1997-10-01	3.6223
1998-01-01	10.0241
1998-04-01	12.6383
1998-07-01	8.1189
1998-10-01	-0.7130
1999-01-01	15.8698
1999-04-01	28.6743
1999-07-01	15.4380
1999-10-01	12.8408
2000-01-01	3.9515
2000-04-01	5.0920
2000-07-01	25.3902
2000-10-01	17.0519
2001-01-01	15.0185
2001-04-01	19.1727
2001-07-01	8.5745
2001-10-01	21.7709
2002-01-01	7.6705
2002-04-01	14.8168
2002-07-01	16.2441
2002-10-01	9.9024
2003-01-01	6.3583
2003-04-01	12.0136
2003-07-01	5.1055
2003-10-01	23.4123
2004-01-01	-4.4884
2004-04-01	10.0786
2004-07-01	-3.4077
2004-10-01	11.9757
2005-01-01	7.6707
2005-04-01	6.0530
2005-07-01	-3.7309
2005-10-01	34.9829
2006-01-01	5.1389
2006-04-01	32.8878
2006-07-01	20.5862
2006-10-01	43.8726
2007-01-01	40.0308
2007-04-01	35.9601
2007-07-01	2.8268
2007-10-01	17.0434
2008-01-01	-7.8631
2008-04-01	54.4462
2008-07-01	15.1344
2008-10-01	26.6809
2009-01-01	61.0138
2009-04-01	24.2289
2009-07-01	11.4746
2009-10-01	8.6725
2010-01-01	19.1019
2010-04-01	-9.5698
2010-07-01	27.0605
2010-10-01	1.8049
2011-01-01	2.9486
2011-04-01	2.7148
2011-07-01	-0.3164
2011-10-01	34.9027
2012-01-01	24.9124
2012-04-01	-3.9563
2012-07-01	16.9958
2012-10-01	25.2467
2013-01-01	12.6428
2013-04-01	15.1119
2013-07-01	8.8377
2013-10-01	-21.0623
2014-01-01	35.2933
2014-04-01	4.0967
2014-07-01	-5.3245
2014-10-01	15.7210
2015-01-01	-8.9718
2015-04-01	18.6029