Quarter	Billions of US Dollars
1987-01-01	0.61859
1987-04-01	0.73964
1987-07-01	0.73849
1987-10-01	0.77436
1988-01-01	0.76536
1988-04-01	0.75360
1988-07-01	0.74480
1988-10-01	0.76839
1989-01-01	0.74873
1989-04-01	0.67440
1989-07-01	0.61474
1989-10-01	0.63787
1990-01-01	0.63449
1990-04-01	0.64121
1990-07-01	0.59745
1990-10-01	0.48113
1991-01-01	0.45524
1991-04-01	0.44537
1991-07-01	0.46334
1991-10-01	0.47687
1992-01-01	0.35947
1992-04-01	0.29646
1992-07-01	0.31287
1992-10-01	0.28587
1993-01-01	0.28584
1993-04-01	0.27770
1993-07-01	0.28520
1993-10-01	0.18689
1994-01-01	0.18971
1994-04-01	0.19402
1994-07-01	0.19688
1994-10-01	0.19685
1995-01-01	0.20841
1995-04-01	0.20841
1995-07-01	0.20572
1995-10-01	0.12000
1996-01-01	0.10000
1996-04-01	0.10000
1996-07-01	0.17500
1996-10-01	0.17500
1997-01-01	0.07500
1997-04-01	0.07500
1997-07-01	0.19000
1997-10-01	0.19000
1998-01-01	0.19000
1998-04-01	0.19000
1998-07-01	0.11500
1998-10-01	0.11500
1999-01-01	0.11500
1999-04-01	0.11500
1999-07-01	0.11500
1999-10-01	0.11500
2000-01-01	0.11500
2000-04-01	0.11500
2000-07-01	0.11500
2000-10-01	0.11500
2001-01-01	0.11500
2001-04-01	0.11500
2001-07-01	0.11500
2001-10-01	0.11500
2002-01-01	0.11500
2002-04-01	0.11500
2005-10-01	0.15000
2006-01-01	0.15000
2006-04-01	0.15000
2006-07-01	0.15000
2006-10-01	0.15000
2007-01-01	0.15000
2007-04-01	0.15000
2007-07-01	0.15000
2007-10-01	0.31131
2008-01-01	0.32609
2008-04-01	0.31294
2008-07-01	0.31239
2008-10-01	0.30394
2009-01-01	0.30291
2009-04-01	0.31056
2009-07-01	0.31757
2009-10-01	0.31725
2010-01-01	0.32011
2010-04-01	0.42739
2010-07-01	0.46017
2010-10-01	0.32584
2011-01-01	0.30462
2011-04-01	0.55693
2011-07-01	0.80902
2011-10-01	0.68322
2012-01-01	0.70007
2012-04-01	1.07338
2012-07-01	1.07649
2012-10-01	1.46259
2013-01-01	1.46673
2013-04-01	1.66359
2013-07-01	1.74003
2013-10-01	1.68691
2014-01-01	1.88465
2014-04-01	2.40568
2014-07-01	2.37440
2014-10-01	2.77499
2015-01-01	2.89300
2015-04-01	3.06232