Quarter	Billions of US Dollars
1987-01-01	1.6490
1987-04-01	1.2090
1987-07-01	1.4840
1987-10-01	1.5170
1988-01-01	2.4370
1988-04-01	2.3120
1988-07-01	2.2810
1988-10-01	2.1670
1989-01-01	2.0880
1989-04-01	2.6250
1989-07-01	2.7560
1989-10-01	3.0570
1990-01-01	3.3230
1990-04-01	3.9200
1990-07-01	3.8250
1990-10-01	3.5790
1991-01-01	3.4660
1991-04-01	3.4660
1991-07-01	3.1710
1991-10-01	3.5690
1992-01-01	4.7740
1992-04-01	5.2080
1992-07-01	4.6590
1992-10-01	3.4780
1993-01-01	3.7970
1993-04-01	3.8180
1993-07-01	5.5305
1993-10-01	6.5173
1994-01-01	8.3442
1994-04-01	10.4207
1994-07-01	11.1408
1994-10-01	11.9428
1995-01-01	11.0523
1995-04-01	11.3851
1995-07-01	12.4460
1995-10-01	14.4459
1996-01-01	18.1872
1996-04-01	19.6486
1996-07-01	19.7955
1996-10-01	20.7819
1997-01-01	22.2711
1997-04-01	22.1496
1997-07-01	23.4117
1997-10-01	24.6166
1998-01-01	25.1414
1998-04-01	24.8539
1998-07-01	27.4330
1998-10-01	28.3138
1999-01-01	29.5810
1999-04-01	30.6628
1999-07-01	35.3106
1999-10-01	38.4239
2000-01-01	41.3888
2000-04-01	42.6073
2000-07-01	42.0108
2000-10-01	42.3180
2001-01-01	44.3259
2001-04-01	37.1813
2001-07-01	35.9509
2001-10-01	33.9751
2002-01-01	32.6160
2002-04-01	35.2671
2002-07-01	37.0117
2002-10-01	37.7130
2003-01-01	39.1880
2003-04-01	33.3904
2003-07-01	32.2426
2003-10-01	37.3242
2004-01-01	35.7613
2004-04-01	33.6376
2004-07-01	33.2182
2004-10-01	37.8300
2005-01-01	49.7399
2005-04-01	46.2871
2005-07-01	52.5821
2005-10-01	47.5860
2006-01-01	56.6390
2006-04-01	61.2952
2006-07-01	61.6165
2006-10-01	66.0406
2007-01-01	81.3351
2007-04-01	91.6815
2007-07-01	77.8063
2007-10-01	75.6132
2008-01-01	55.5954
2008-04-01	51.0245
2008-07-01	42.2651
2008-10-01	31.0314
2009-01-01	21.6190
2009-04-01	23.2056
2009-07-01	25.9109
2009-10-01	24.0358
2010-01-01	27.5740
2010-04-01	23.0844
2010-07-01	25.6998
2010-10-01	26.1376
2011-01-01	32.0792
2011-04-01	38.9097
2011-07-01	42.3981
2011-10-01	42.2127
2012-01-01	47.0529
2012-04-01	51.2844
2012-07-01	53.3622
2012-10-01	50.6060
2013-01-01	61.0945
2013-04-01	71.3016
2013-07-01	78.2879
2013-10-01	86.1513
2014-01-01	87.4693
2014-04-01	94.9906
2014-07-01	96.7457
2014-10-01	92.3971
2015-01-01	88.3415
2015-04-01	84.6758