Quarter	Billions of US Dollars
1987-01-01	0.1000
1987-04-01	0.1000
1987-07-01	0.1000
1987-10-01	0.1000
1988-01-01	0.1731
1988-04-01	0.1662
1988-07-01	0.4289
1988-10-01	0.4473
1989-01-01	0.8997
1989-04-01	0.8881
1989-07-01	1.3929
1989-10-01	1.5246
1990-01-01	1.7897
1990-04-01	1.7958
1990-07-01	1.9121
1990-10-01	1.9912
1991-01-01	1.7503
1991-04-01	1.6623
1991-07-01	1.9250
1991-10-01	2.0868
1992-01-01	1.9426
1992-04-01	2.0733
1992-07-01	2.2460
1992-10-01	1.9886
1993-01-01	1.9823
1993-04-01	1.8128
1993-07-01	1.8314
1993-10-01	1.7256
1994-01-01	1.6845
1994-04-01	1.7632
1994-07-01	1.7670
1994-10-01	1.7642
1995-01-01	1.6168
1995-04-01	1.6154
1995-07-01	1.1253
1995-10-01	1.1481
1996-01-01	1.1112
1996-04-01	1.0976
1996-07-01	0.1196
1996-10-01	0.0993
1997-01-01	0.0939
1997-04-01	0.1285
1997-07-01	0.1289
1997-10-01	0.2642
1998-01-01	0.4177
1998-04-01	0.4177
1998-07-01	0.3750
1998-10-01	0.3750
1999-01-01	0.3750
1999-04-01	0.3750
1999-07-01	0.3750
1999-10-01	0.3750
2000-01-01	0.3750
2000-04-01	0.3750
2000-07-01	0.1750
2000-10-01	0.1750
2001-01-01	0.1750
2001-04-01	0.1750
2001-07-01	0.1750
2001-10-01	0.1750
2002-01-01	0.1750
2002-04-01	0.1750
2002-07-01	0.1750
2002-10-01	0.3000
2003-01-01	0.3000
2003-04-01	0.6250
2003-07-01	0.6250
2003-10-01	1.6550
2004-01-01	1.7800
2004-04-01	1.9300
2004-07-01	2.4800
2004-10-01	2.4550
2005-01-01	3.7550
2005-04-01	3.9550
2005-07-01	4.6550
2005-10-01	4.7300
2006-01-01	4.7804
2006-04-01	5.8067
2006-07-01	6.9852
2006-10-01	7.8315
2007-01-01	10.4047
2007-04-01	12.6821
2007-07-01	13.1240
2007-10-01	13.2152
2008-01-01	13.3119
2008-04-01	14.0404
2008-07-01	14.2874
2008-10-01	13.8451
2009-01-01	13.5976
2009-04-01	13.5728
2009-07-01	13.1924
2009-10-01	12.7719
2010-01-01	10.1494
2010-04-01	8.5501
2010-07-01	10.0846
2010-10-01	10.9213
2011-01-01	11.4366
2011-04-01	11.8353
2011-07-01	9.8902
2011-10-01	10.2728
2012-01-01	10.9197
2012-04-01	13.2224
2012-07-01	22.7580
2012-10-01	31.2876
2013-01-01	33.6121
2013-04-01	34.8037
2013-07-01	34.2612
2013-10-01	36.0368
2014-01-01	38.0188
2014-04-01	38.2212
2014-07-01	39.2475
2014-10-01	38.4411
2015-01-01	38.2178
2015-04-01	38.3674