Quarter	Billions of US Dollars
1987-01-01	1.3162
1987-04-01	0.5669
1987-07-01	0.6879
1987-10-01	0.4446
1988-01-01	0.2446
1988-04-01	1.3061
1988-07-01	1.0220
1988-10-01	0.9011
1989-01-01	0.8090
1989-04-01	2.3037
1989-07-01	1.1645
1989-10-01	0.9455
1990-01-01	1.1783
1990-04-01	0.9999
1990-07-01	0.7016
1990-10-01	-0.2834
1991-01-01	1.5978
1991-04-01	0.6186
1991-07-01	0.5262
1991-10-01	2.2372
1992-01-01	2.8814
1992-04-01	1.4477
1992-07-01	1.4766
1992-10-01	2.5284
1993-01-01	4.8227
1993-04-01	5.7856
1993-07-01	3.5525
1993-10-01	2.8405
1994-01-01	5.9250
1994-04-01	3.0837
1994-07-01	1.7959
1994-10-01	2.4862
1995-01-01	3.4333
1995-04-01	6.5913
1995-07-01	6.6268
1995-10-01	6.6018
1996-01-01	9.9937
1996-04-01	9.3536
1996-07-01	6.5947
1996-10-01	5.6689
1997-01-01	12.4805
1997-04-01	7.3802
1997-07-01	7.2888
1997-10-01	3.8175
1998-01-01	15.5255
1998-04-01	8.6325
1998-07-01	10.5581
1998-10-01	4.7258
1999-01-01	22.9683
1999-04-01	13.6821
1999-07-01	22.0367
1999-10-01	1.5139
2000-01-01	24.2736
2000-04-01	15.7136
2000-07-01	33.0811
2000-10-01	12.5736
2001-01-01	22.3671
2001-04-01	8.7339
2001-07-01	8.1469
2001-10-01	12.9602
2002-01-01	18.5835
2002-04-01	24.3411
2002-07-01	10.4559
2002-10-01	7.5753
2003-01-01	8.6039
2003-04-01	11.8545
2003-07-01	13.0658
2003-10-01	13.4443
2004-01-01	-15.5638
2004-04-01	15.3227
2004-07-01	20.2095
2004-10-01	11.2139
2005-01-01	23.9094
2005-04-01	13.7534
2005-07-01	-10.9266
2005-10-01	27.4425
2006-01-01	31.8045
2006-04-01	26.7005
2006-07-01	29.2288
2006-10-01	33.1755
2007-01-01	11.8080
2007-04-01	39.8643
2007-07-01	-6.0660
2007-10-01	15.9811
2008-01-01	18.1593
2008-04-01	18.2863
2008-07-01	4.5672
2008-10-01	41.9308
2009-01-01	49.3665
2009-04-01	13.4093
2009-07-01	-0.1507
2009-10-01	-6.9770
2010-01-01	-1.0743
2010-04-01	-20.6291
2010-07-01	-4.9728
2010-10-01	-12.2943
2011-01-01	-10.0987
2011-04-01	7.1705
2011-07-01	23.6833
2011-10-01	21.6511
2012-01-01	19.5112
2012-04-01	-11.9251
2012-07-01	-18.4001
2012-10-01	17.9571
2013-01-01	3.1859
2013-04-01	-2.5994
2013-07-01	-7.8497
2013-10-01	-8.7302
2014-01-01	-18.5679
2014-04-01	17.1450
2014-07-01	-2.8679
2014-10-01	5.6212
2015-01-01	1.4221
2015-04-01	4.9931