Quarter	Billions of US Dollars
1993-07-01	2.3555
1993-10-01	2.4659
1994-01-01	2.8428
1994-04-01	2.8435
1994-07-01	2.9714
1994-10-01	3.1262
1995-01-01	3.5581
1995-04-01	3.7616
1995-07-01	3.6282
1995-10-01	3.2342
1996-01-01	3.1029
1996-04-01	2.8878
1996-07-01	2.7678
1996-10-01	2.5995
1997-01-01	2.3647
1997-04-01	2.3020
1997-07-01	2.2287
1997-10-01	2.0859
1998-01-01	2.0025
1998-04-01	2.1038
1998-07-01	2.3288
1998-10-01	2.6541
1999-01-01	2.5537
1999-04-01	2.4564
1999-07-01	2.6399
1999-10-01	2.5057
2000-01-01	2.7978
2000-04-01	2.8074
2000-07-01	2.5869
2000-10-01	2.7133
2001-01-01	2.5407
2001-04-01	2.4543
2001-07-01	2.6749
2001-10-01	2.7464
2002-01-01	2.7140
2002-04-01	3.3438
2002-07-01	3.3114
2002-10-01	3.4816
2003-01-01	3.5893
2003-04-01	3.7956
2003-07-01	4.3024
2003-10-01	7.2965
2004-01-01	7.3465
2004-04-01	7.5506
2004-07-01	7.7088
2004-10-01	9.6328
2005-01-01	10.9943
2005-04-01	11.1268
2005-07-01	10.7829
2005-10-01	13.5060
2006-01-01	14.1081
2006-04-01	15.0808
2006-07-01	14.8886
2006-10-01	16.6888
2007-01-01	18.1894
2007-04-01	20.1459
2007-07-01	21.1824
2007-10-01	26.9313
2008-01-01	28.8892
2008-04-01	28.3298
2008-07-01	25.6473
2008-10-01	28.3785
2009-01-01	27.4352
2009-04-01	29.7851
2009-07-01	35.3538
2009-10-01	34.8859
2010-01-01	32.4417
2010-04-01	32.0145
2010-07-01	36.6559
2010-10-01	36.5359
2011-01-01	39.5569
2011-04-01	41.3918
2011-07-01	40.4342
2011-10-01	39.7991
2012-01-01	41.4415
2012-04-01	40.9818
2012-07-01	43.9736
2012-10-01	44.6738
2013-01-01	44.3248
2013-04-01	46.1269
2013-07-01	50.3735
2013-10-01	52.0127
2014-01-01	49.2327
2014-04-01	49.1153
2014-07-01	44.7219
2014-10-01	44.8446
2015-01-01	39.5616
2015-04-01	41.0256