Quarter	Billions of US Dollars
1987-01-01	0.0800
1987-04-01	0.0800
1987-07-01	0.0800
1987-10-01	0.0800
1988-01-01	0.0800
1988-04-01	0.0800
1988-07-01	0.0800
1988-10-01	0.0800
1989-01-01	0.0800
1989-04-01	0.0800
1989-07-01	0.0800
1989-10-01	0.0500
1990-01-01	0.0500
1990-04-01	0.0500
1990-07-01	0.0500
1990-10-01	0.0500
1991-01-01	0.0835
1991-04-01	0.0840
1991-07-01	0.0855
1991-10-01	0.0868
1992-01-01	0.0861
1992-04-01	0.0871
1992-07-01	0.0877
1992-10-01	0.0865
1993-01-01	0.0866
1993-04-01	0.0870
1993-07-01	0.0878
1993-10-01	0.0873
1994-01-01	0.0882
1994-04-01	0.0894
1994-07-01	0.0904
1994-10-01	0.0911
1995-01-01	0.0923
1995-04-01	0.0930
1995-07-01	0.1322
1995-10-01	0.1619
1996-01-01	0.1088
1996-04-01	0.3598
1996-07-01	0.3753
1996-10-01	0.4116
1997-01-01	0.4319
1997-04-01	0.5094
1997-07-01	0.8515
1997-10-01	0.8763
1998-01-01	0.9365
1998-04-01	1.8874
1998-07-01	1.9008
1998-10-01	2.0410
1999-01-01	2.8111
1999-04-01	2.6251
1999-07-01	2.5318
1999-10-01	2.7557
2000-01-01	2.8152
2000-04-01	2.9341
2000-07-01	2.7983
2000-10-01	2.7660
2001-01-01	2.6987
2001-04-01	2.5644
2001-07-01	2.7355
2001-10-01	2.5402
2002-01-01	2.5150
2002-04-01	2.1661
2002-07-01	2.3262
2002-10-01	2.5822
2003-01-01	2.6335
2003-04-01	2.7751
2003-07-01	3.0528
2003-10-01	3.6224
2004-01-01	4.0093
2004-04-01	4.4848
2004-07-01	5.6205
2004-10-01	6.3001
2005-01-01	6.5983
2005-04-01	6.8075
2005-07-01	8.8141
2005-10-01	10.1189
2006-01-01	10.6997
2006-04-01	11.1835
2006-07-01	12.0134
2006-10-01	12.6334
2007-01-01	13.6426
2007-04-01	14.1349
2007-07-01	14.7611
2007-10-01	14.4441
2008-01-01	14.4773
2008-04-01	14.2551
2008-07-01	14.0949
2008-10-01	13.8050
2009-01-01	12.0896
2009-04-01	11.1574
2009-07-01	12.0394
2009-10-01	13.8037
2010-01-01	13.1674
2010-04-01	12.9765
2010-07-01	14.2458
2010-10-01	13.8815
2011-01-01	15.2021
2011-04-01	16.2908
2011-07-01	15.6174
2011-10-01	16.4675
2012-01-01	17.6600
2012-04-01	18.2075
2012-07-01	21.4396
2012-10-01	22.7889
2013-01-01	22.9576
2013-04-01	23.5141
2013-07-01	23.3311
2013-10-01	23.0085
2014-01-01	23.4093
2014-04-01	23.5356
2014-07-01	25.9032
2014-10-01	24.2322
2015-01-01	24.9239
2015-04-01	25.7160