Quarter	Billions of US Dollars
1993-07-01	9.933
1993-10-01	14.032
1994-01-01	16.868
1994-04-01	7.584
1994-07-01	10.600
1994-10-01	10.730
1995-01-01	8.082
1995-04-01	10.286
1995-07-01	15.839
1995-10-01	8.190
1996-01-01	24.466
1996-04-01	27.892
1996-07-01	29.433
1996-10-01	42.096
1997-01-01	33.161
1997-04-01	29.497
1997-07-01	40.560
1997-10-01	31.010
1998-01-01	29.704
1998-04-01	50.177
1998-07-01	31.066
1998-10-01	14.496
1999-01-01	53.117
1999-04-01	75.948
1999-07-01	55.495
1999-10-01	49.749
2000-01-01	53.894
2000-04-01	62.834
2000-07-01	42.068
2000-10-01	63.085
2001-01-01	79.168
2001-04-01	77.398
2001-07-01	62.929
2001-10-01	86.451
2002-01-01	42.492
2002-04-01	56.608
2002-07-01	26.694
2002-10-01	43.254
2003-01-01	64.787
2003-04-01	63.315
2003-07-01	73.207
2003-10-01	116.543
2004-01-01	109.458
2004-04-01	117.395
2004-07-01	103.557
2004-10-01	145.306
2005-01-01	95.633
2005-04-01	191.481
2005-07-01	34.387
2005-10-01	251.023
2006-01-01	179.830
2006-04-01	232.711
2006-07-01	229.574
2006-10-01	405.023
2007-01-01	359.099
2007-04-01	399.777
2007-07-01	95.796
2007-10-01	88.616
2008-01-01	81.839
2008-04-01	281.627
2008-07-01	193.916
2008-10-01	408.855
2009-01-01	40.504
2009-04-01	71.470
2009-07-01	35.612
2009-10-01	-24.373
2010-01-01	-14.727
2010-04-01	-88.469
2010-07-01	29.495
2010-10-01	-72.029
2011-01-01	-51.737
2011-04-01	6.421
2011-07-01	-82.471
2011-10-01	12.851
2012-01-01	-93.112
2012-04-01	-150.203
2012-07-01	-138.118
2012-10-01	-50.949
2013-01-01	-64.184
2013-04-01	-69.608
2013-07-01	-12.635
2013-10-01	-1.137
2014-01-01	-91.861
2014-04-01	9.232
2014-07-01	0.997
2014-10-01	-31.122
2015-01-01	-22.100
2015-04-01	-17.249