Quarter	Billions of US Dollars
1987-01-01	0.5670
1987-04-01	0.7720
1987-07-01	1.2320
1987-10-01	1.2440
1988-01-01	1.3870
1988-04-01	1.4280
1988-07-01	1.4650
1988-10-01	1.5360
1989-01-01	1.7660
1989-04-01	1.5790
1989-07-01	1.8880
1989-10-01	1.3130
1990-01-01	1.6160
1990-04-01	1.9030
1990-07-01	2.1350
1990-10-01	1.7250
1991-01-01	2.0750
1991-04-01	2.0790
1991-07-01	2.1820
1991-10-01	2.0020
1992-01-01	2.3370
1992-04-01	2.3170
1992-07-01	2.4420
1992-10-01	3.1920
1993-01-01	1.4240
1993-04-01	1.6750
1993-07-01	1.5232
1993-10-01	1.3390
1994-01-01	0.9760
1994-04-01	0.8144
1994-07-01	0.8077
1994-10-01	0.6551
1995-01-01	1.5624
1995-04-01	1.6986
1995-07-01	1.6774
1995-10-01	1.4586
1996-01-01	0.9745
1996-04-01	1.0814
1996-07-01	0.7837
1996-10-01	1.0138
1997-01-01	1.1779
1997-04-01	1.2298
1997-07-01	1.1174
1997-10-01	0.6678
1998-01-01	0.5160
1998-04-01	0.5213
1998-07-01	0.6185
1998-10-01	0.6676
1999-01-01	0.4209
1999-04-01	0.5432
1999-07-01	1.1459
1999-10-01	2.0092
2000-01-01	1.0413
2000-04-01	1.1036
2000-07-01	1.2358
2000-10-01	0.8010
2001-01-01	0.6748
2001-04-01	0.7594
2001-07-01	0.8916
2001-10-01	0.7372
2002-01-01	0.6633
2002-04-01	0.7028
2002-07-01	0.6692
2002-10-01	0.8354
2003-01-01	0.8489
2003-04-01	0.8583
2003-07-01	0.9445
2003-10-01	0.9873
2004-01-01	0.9770
2004-04-01	1.0330
2004-07-01	0.9934
2004-10-01	0.9523
2005-01-01	1.0087
2005-04-01	1.1903
2005-07-01	1.1652
2005-10-01	2.1309
2006-01-01	2.2995
2006-04-01	3.9556
2006-07-01	4.9511
2006-10-01	4.9892
2007-01-01	9.5111
2007-04-01	9.6552
2007-07-01	13.6838
2007-10-01	15.6387
2008-01-01	17.0096
2008-04-01	28.9906
2008-07-01	44.3843
2008-10-01	32.1694
2009-01-01	44.2853
2009-04-01	45.7539
2009-07-01	40.1677
2009-10-01	44.6761
2010-01-01	41.4110
2010-04-01	29.3429
2010-07-01	34.4386
2010-10-01	28.7338
2011-01-01	27.3003
2011-04-01	23.8120
2011-07-01	17.3183
2011-10-01	10.5562
2012-01-01	20.2213
2012-04-01	9.5807
2012-07-01	6.7637
2012-10-01	5.6703
2013-01-01	5.8549
2013-04-01	8.3389
2013-07-01	9.4261
2013-10-01	7.9680
2014-01-01	10.5915
2014-04-01	10.7976
2014-07-01	10.9237
2014-10-01	13.0738
2015-01-01	15.0518
2015-04-01	10.3835