Quarter	Billions of US Dollars
1987-01-01	0.0500
1987-04-01	0.0500
1987-07-01	0.0650
1987-10-01	0.0500
1988-01-01	0.0500
1988-04-01	0.0500
1988-07-01	0.0500
1988-10-01	0.0500
1989-01-01	0.0550
1989-04-01	0.0550
1989-07-01	0.0500
1989-10-01	0.0500
1990-01-01	0.0500
1990-04-01	0.0500
1990-07-01	0.0300
1990-10-01	0.0300
1991-01-01	0.0300
1991-04-01	0.0300
1991-07-01	0.0300
1991-10-01	0.0300
1992-01-01	0.0130
1992-04-01	0.0130
1992-07-01	0.0130
1993-07-01	0.0617
1993-10-01	0.0579
1994-01-01	0.0598
1994-04-01	0.0627
1994-07-01	0.0646
1994-10-01	0.1614
1995-01-01	0.1807
1995-04-01	0.1807
1995-07-01	0.1762
1995-10-01	0.1744
1996-01-01	0.1694
1996-04-01	0.1643
1996-07-01	0.1637
1996-10-01	0.1608
1997-01-01	0.1490
1997-04-01	0.1433
1997-07-01	0.1416
1997-10-01	0.1395
1998-01-01	0.1354
1998-04-01	0.1382
1998-07-01	0.2983
1998-10-01	0.2989
1999-01-01	0.2746
1999-04-01	0.2640
1999-07-01	0.2726
1999-10-01	0.2568
2000-01-01	0.2442
2000-04-01	0.2443
2000-07-01	0.2129
2000-10-01	0.2260
2001-01-01	0.2145
2001-04-01	0.5875
2001-07-01	0.6210
2001-10-01	0.5318
2002-01-01	0.5980
2002-04-01	0.6829
2002-07-01	0.6758
2002-10-01	0.7216
2003-01-01	0.7455
2003-04-01	1.1753
2003-07-01	1.1947
2003-10-01	1.2583
2004-01-01	1.2358
2004-04-01	0.8292
2004-07-01	0.9726
2004-10-01	1.5458
2005-01-01	1.5277
2005-04-01	1.5156
2005-07-01	1.9267
2005-10-01	2.3004
2006-01-01	3.0865
2006-04-01	2.7969
2006-07-01	4.3677
2006-10-01	6.1504
2007-01-01	7.6580
2007-04-01	8.7243
2007-07-01	9.2872
2007-10-01	10.0438
2008-01-01	12.3737
2008-04-01	13.1337
2008-07-01	12.4650
2008-10-01	11.8707
2009-01-01	10.3515
2009-04-01	10.9262
2009-07-01	11.1738
2009-10-01	11.5941
2010-01-01	9.9993
2010-04-01	8.4646
2010-07-01	9.2896
2010-10-01	8.5219
2011-01-01	8.3635
2011-04-01	8.3721
2011-07-01	7.9037
2011-10-01	7.6731
2012-01-01	7.6555
2012-04-01	6.6961
2012-07-01	7.2545
2012-10-01	8.5370
2013-01-01	8.3153
2013-04-01	8.4667
2013-07-01	8.7077
2013-10-01	8.8514
2014-01-01	8.7736
2014-04-01	8.0539
2014-07-01	6.6772
2014-10-01	7.6150
2015-01-01	7.0444
2015-04-01	7.7151