Quarter	Billions of US Dollars
1990-04-01	0.0510
1990-07-01	0.0190
1990-10-01	0.2470
1991-01-01	0.1980
1991-04-01	0.1360
1991-07-01	0.2440
1991-10-01	0.1310
1992-01-01	0.1690
1992-04-01	0.0930
1992-07-01	0.0660
1992-10-01	0.0850
1993-01-01	0.0650
1993-04-01	0.1010
1993-07-01	0.3440
1993-10-01	0.7019
1994-01-01	1.9083
1994-04-01	2.3760
1994-07-01	2.1658
1994-10-01	2.1335
1995-01-01	2.9804
1995-04-01	3.7085
1995-07-01	3.5169
1995-10-01	5.1640
1996-01-01	3.9806
1996-04-01	7.1202
1996-07-01	7.0642
1996-10-01	8.1329
1997-01-01	8.8860
1997-04-01	11.0794
1997-07-01	9.3082
1997-10-01	9.9133
1998-01-01	8.8026
1998-04-01	7.0921
1998-07-01	10.0937
1998-10-01	15.4152
1999-01-01	13.5348
1999-04-01	18.0015
1999-07-01	25.1558
1999-10-01	30.0786
2000-01-01	31.6384
2000-04-01	49.8577
2000-07-01	52.7434
2000-10-01	49.5960
2001-01-01	37.7797
2001-04-01	31.5341
2001-07-01	32.5510
2001-10-01	32.6108
2002-01-01	26.5937
2002-04-01	24.5130
2002-07-01	19.5130
2002-10-01	16.2557
2003-01-01	14.3983
2003-04-01	12.4523
2003-07-01	11.5751
2003-10-01	11.8598
2004-01-01	11.4853
2004-04-01	12.2271
2004-07-01	9.5260
2004-10-01	9.3299
2005-01-01	11.7402
2005-04-01	9.5361
2005-07-01	12.7840
2005-10-01	6.3952
2006-01-01	6.8780
2006-04-01	6.6567
2006-07-01	9.0974
2006-10-01	7.1233
2007-01-01	8.7977
2007-04-01	10.2275
2007-07-01	10.1942
2007-10-01	17.7961
2008-01-01	26.4924
2008-04-01	31.9842
2008-07-01	31.1996
2008-10-01	26.7400
2009-01-01	19.2329
2009-04-01	13.7216
2009-07-01	11.5783
2009-10-01	12.9934
2010-01-01	14.0232
2010-04-01	15.0178
2010-07-01	16.4840
2010-10-01	16.0210
2011-01-01	14.6341
2011-04-01	15.1444
2011-07-01	17.3876
2011-10-01	15.4647
2012-01-01	12.8645
2012-04-01	13.1051
2012-07-01	12.7871
2012-10-01	11.5584
2013-01-01	10.8980
2013-04-01	10.4484
2013-07-01	10.4902
2013-10-01	11.2412
2014-01-01	10.4170
2014-04-01	13.6902
2014-07-01	13.5090
2014-10-01	8.8639
2015-01-01	9.7824
2015-04-01	9.2147