Quarter	Billions of US Dollars
1993-07-01	0.25823
1993-10-01	0.27228
1994-01-01	0.13487
1994-04-01	0.29304
1994-07-01	0.30624
1994-10-01	0.25552
1995-01-01	0.34461
1995-04-01	0.43580
1995-07-01	0.67969
1995-10-01	1.38370
1996-01-01	1.34030
1996-04-01	1.21219
1996-07-01	1.74003
1996-10-01	1.64808
1997-01-01	1.14948
1997-04-01	1.37367
1997-07-01	1.15046
1997-10-01	1.03885
1998-01-01	1.54251
1998-04-01	0.77355
1998-07-01	0.87685
1998-10-01	1.69178
1999-01-01	2.57569
1999-04-01	1.50292
1999-07-01	2.17605
1999-10-01	0.85407
2000-01-01	2.02678
2000-04-01	1.11868
2000-07-01	1.48437
2000-10-01	1.43386
2001-01-01	2.12810
2001-04-01	1.09398
2001-07-01	1.14060
2001-10-01	2.10931
2002-01-01	1.54326
2002-04-01	1.20902
2002-07-01	1.53100
2002-10-01	1.29713
2003-01-01	1.93566
2003-04-01	1.60415
2003-07-01	1.47987
2003-10-01	1.72245
2004-01-01	2.13848
2004-04-01	2.59219
2004-07-01	2.45569
2004-10-01	1.29184
2005-01-01	1.98547
2005-04-01	2.65312
2005-07-01	2.77993
2005-10-01	2.66017
2006-01-01	2.26731
2006-04-01	1.88398
2006-07-01	1.93226
2006-10-01	2.09545
2007-01-01	3.76856
2007-04-01	3.94600
2007-07-01	2.18149
2007-10-01	4.20561
2008-01-01	4.59397
2008-04-01	4.88593
2008-07-01	2.56786
2008-10-01	2.28744
2009-01-01	5.63052
2009-04-01	4.51370
2009-07-01	4.86276
2009-10-01	2.76868
2010-01-01	2.15510
2010-04-01	2.65561
2010-07-01	2.87806
2010-10-01	1.41444
2011-01-01	2.42055
2011-04-01	3.08177
2011-07-01	3.17838
2011-10-01	0.75771
2012-01-01	1.84640
2012-04-01	1.48372
2012-07-01	0.81759
2012-10-01	0.78696
2013-01-01	0.84857
2013-04-01	0.46659
2013-07-01	1.26765
2013-10-01	1.58008
2014-01-01	2.47502
2014-04-01	2.37852
2014-07-01	1.67613
2014-10-01	1.39110
2015-01-01	0.53962
2015-04-01	0.44181