Quarter	Billions of US Dollars
1987-01-01	1.4271
1987-04-01	1.0844
1987-07-01	1.3873
1987-10-01	0.3448
1988-01-01	1.7012
1988-04-01	0.6186
1988-07-01	1.2645
1988-10-01	1.4635
1989-01-01	1.1083
1989-04-01	0.4888
1989-07-01	0.3404
1989-10-01	0.3222
1990-01-01	0.9181
1990-04-01	0.3708
1990-07-01	0.2335
1990-10-01	0.5976
1991-01-01	-0.2684
1991-04-01	0.2884
1991-07-01	0.6063
1991-10-01	1.5640
1992-01-01	0.0772
1992-04-01	1.4891
1992-07-01	1.0324
1992-10-01	1.1037
1993-01-01	0.3004
1993-04-01	0.0840
1993-07-01	4.2010
1993-10-01	6.0018
1994-01-01	6.4841
1994-04-01	2.4493
1994-07-01	5.5863
1994-10-01	8.2529
1995-01-01	8.2356
1995-04-01	7.4161
1995-07-01	7.1224
1995-10-01	8.3335
1996-01-01	11.2240
1996-04-01	8.6384
1996-07-01	11.5681
1996-10-01	16.1290
1997-01-01	16.1068
1997-04-01	11.8331
1997-07-01	8.3386
1997-10-01	4.5163
1998-01-01	12.2314
1998-04-01	11.5910
1998-07-01	5.2958
1998-10-01	-2.1916
1999-01-01	15.9893
1999-04-01	14.0576
1999-07-01	26.6516
1999-10-01	21.7568
2000-01-01	19.3598
2000-04-01	29.7047
2000-07-01	13.8019
2000-10-01	17.4581
2001-01-01	22.6600
2001-04-01	15.3453
2001-07-01	4.9699
2001-10-01	7.5111
2002-01-01	15.1778
2002-04-01	8.5182
2002-07-01	15.3963
2002-10-01	7.3880
2003-01-01	30.9652
2003-04-01	11.6992
2003-07-01	4.5627
2003-10-01	29.7666
2004-01-01	54.5059
2004-04-01	24.1362
2004-07-01	37.6536
2004-10-01	17.2441
2005-01-01	27.2480
2005-04-01	36.2501
2005-07-01	7.8219
2005-10-01	0.4495
2006-01-01	26.0646
2006-04-01	14.5808
2006-07-01	12.8824
2006-10-01	16.0100
2007-01-01	32.2326
2007-04-01	22.1095
2007-07-01	6.7583
2007-10-01	7.7958
2008-01-01	-16.6291
2008-04-01	3.8674
2008-07-01	-34.0278
2008-10-01	-34.5405
2009-01-01	-56.2365
2009-04-01	-18.1919
2009-07-01	-24.9636
2009-10-01	-24.9978
2010-01-01	6.3651
2010-04-01	-1.5121
2010-07-01	-3.3481
2010-10-01	-22.3095
2011-01-01	5.6454
2011-04-01	-15.0456
2011-07-01	17.0829
2011-10-01	6.4275
2012-01-01	8.5520
2012-04-01	12.4021
2012-07-01	-20.5335
2012-10-01	-10.5990
2013-01-01	-14.5099
2013-04-01	-7.8549
2013-07-01	-19.4432
2013-10-01	-19.3571
2014-01-01	1.2063
2014-04-01	4.6912
2014-07-01	2.0164
2014-10-01	-5.7826
2015-01-01	1.6009
2015-04-01	-17.5655