Quarter	Billions of US Dollars
1987-01-01	1.1816
1987-04-01	1.1735
1987-07-01	1.1726
1987-10-01	1.6161
1988-01-01	1.9014
1988-04-01	1.8028
1988-07-01	1.9850
1988-10-01	2.3691
1989-01-01	2.6366
1989-04-01	2.6057
1989-07-01	2.9623
1989-10-01	3.1708
1990-01-01	3.3319
1990-04-01	3.5111
1990-07-01	3.9680
1990-10-01	4.4530
1991-01-01	4.2051
1991-04-01	4.1672
1991-07-01	4.5095
1991-10-01	5.7359
1992-01-01	5.8991
1992-04-01	6.3199
1992-07-01	6.9119
1992-10-01	6.3233
1993-01-01	7.6932
1993-04-01	8.4435
1993-07-01	9.9107
1993-10-01	9.9832
1994-01-01	11.4635
1994-04-01	12.0720
1994-07-01	12.8036
1994-10-01	13.3989
1995-01-01	14.6345
1995-04-01	15.6844
1995-07-01	15.1469
1995-10-01	15.4673
1996-01-01	14.9451
1996-04-01	14.7452
1996-07-01	14.1076
1996-10-01	13.3289
1997-01-01	12.4865
1997-04-01	12.7184
1997-07-01	12.1813
1997-10-01	11.3558
1998-01-01	10.8210
1998-04-01	10.6150
1998-07-01	11.1821
1998-10-01	11.9988
1999-01-01	10.6911
1999-04-01	10.4418
1999-07-01	10.4904
1999-10-01	10.0444
2000-01-01	8.8183
2000-04-01	8.2980
2000-07-01	7.6336
2000-10-01	7.4530
2001-01-01	7.0469
2001-04-01	6.6376
2001-07-01	6.9309
2001-10-01	6.0871
2002-01-01	5.5378
2002-04-01	5.8249
2002-07-01	5.5622
2002-10-01	5.7210
2003-01-01	5.2337
2003-04-01	4.6716
2003-07-01	4.1371
2003-10-01	4.1276
2004-01-01	2.5828
2004-04-01	2.5080
2004-07-01	2.3190
2004-10-01	2.4691
2005-01-01	2.1616
2005-04-01	2.0943
2005-07-01	1.5684
2005-10-01	1.2172
2006-01-01	1.9605
2006-04-01	2.1324
2006-07-01	2.1241
2006-10-01	2.8514
2007-01-01	2.8808
2007-04-01	2.8923
2007-07-01	3.0526
2007-10-01	2.8958
2008-01-01	2.8942
2008-04-01	3.2042
2008-07-01	2.9978
2008-10-01	3.0317
2009-01-01	2.8871
2009-04-01	3.0070
2009-07-01	3.1297
2009-10-01	3.0766
2010-01-01	2.9311
2010-04-01	2.6198
2010-07-01	2.8595
2010-10-01	2.8318
2011-01-01	2.4634
2011-04-01	2.6461
2011-07-01	2.5201
2011-10-01	2.4600
2012-01-01	2.5149
2012-04-01	2.5359
2012-07-01	3.0897
2012-10-01	3.1802
2013-01-01	3.1136
2013-04-01	3.1493
2013-07-01	3.7531
2013-10-01	3.5837
2014-01-01	3.7954
2014-04-01	3.6020
2014-07-01	3.3933
2014-10-01	3.7553
2015-01-01	3.4914
2015-04-01	9.7899