Quarter	Billions of US Dollars
1989-07-01	0.02000
1989-10-01	0.03700
1990-01-01	0.03000
1990-04-01	0.04800
1990-07-01	0.01200
1990-10-01	0.00500
1991-01-01	0.00400
1991-04-01	0.11200
1991-07-01	0.13200
1991-10-01	0.08400
1992-01-01	0.93300
1992-04-01	0.17400
1992-07-01	0.11400
1992-10-01	0.18200
1993-01-01	0.24800
1993-04-01	0.38300
1993-07-01	0.71959
1993-10-01	0.57794
1994-01-01	0.92984
1994-04-01	0.71338
1994-07-01	0.62530
1994-10-01	0.40367
1995-01-01	0.23065
1995-04-01	0.21023
1995-07-01	0.31027
1995-10-01	0.31485
1996-01-01	0.32027
1996-04-01	0.87066
1996-07-01	0.40355
1996-10-01	0.44027
1997-01-01	0.31219
1997-04-01	0.28910
1997-07-01	0.40803
1997-10-01	0.42828
1998-01-01	0.39764
1998-04-01	0.41200
1998-07-01	0.43275
1998-10-01	0.57802
1999-01-01	0.62279
1999-04-01	0.47302
1999-07-01	0.53181
1999-10-01	0.86434
2000-01-01	0.60460
2000-04-01	0.76770
2000-07-01	0.77462
2000-10-01	0.78244
2001-01-01	1.11302
2001-04-01	0.64145
2001-07-01	0.71417
2001-10-01	0.52088
2002-01-01	0.64735
2002-04-01	0.59906
2002-07-01	1.02705
2002-10-01	0.92159
2003-01-01	1.45154
2003-04-01	1.50344
2003-07-01	1.53175
2003-10-01	1.88090
2004-01-01	1.56946
2004-04-01	1.74021
2004-07-01	3.08949
2004-10-01	2.78943
2005-01-01	2.72188
2005-04-01	2.83923
2005-07-01	3.57868
2005-10-01	2.94769
2006-01-01	4.29541
2006-04-01	3.32510
2006-07-01	2.18702
2006-10-01	3.43286
2007-01-01	2.74143
2007-04-01	2.64170
2007-07-01	3.49046
2007-10-01	4.35426
2008-01-01	4.80373
2008-04-01	3.78874
2008-07-01	2.39191
2008-10-01	1.68668
2009-01-01	1.51802
2009-04-01	1.72827
2009-07-01	1.63508
2009-10-01	1.00783
2010-01-01	1.60271
2010-04-01	1.13813
2010-07-01	1.48190
2010-10-01	1.80687
2011-01-01	2.62432
2011-04-01	2.20093
2011-07-01	1.79501
2011-10-01	1.64085
2012-01-01	1.71149
2012-04-01	1.68787
2012-07-01	1.63615
2012-10-01	1.65690
2013-01-01	1.13701
2013-04-01	1.08069
2013-07-01	1.01347
2013-10-01	0.90168
2014-01-01	3.98440
2014-04-01	6.24322
2014-07-01	7.89545
2014-10-01	8.29237
2015-01-01	4.80852
2015-04-01	3.49826