Quarter	Billions of US Dollars
1993-07-01	5.8693
1993-10-01	5.4977
1994-01-01	7.3451
1994-04-01	6.9871
1994-07-01	7.4185
1994-10-01	7.0830
1995-01-01	2.1485
1995-04-01	5.4045
1995-07-01	6.4370
1995-10-01	6.9808
1996-01-01	8.9315
1996-04-01	12.0113
1996-07-01	10.0412
1996-10-01	9.6941
1997-01-01	8.6625
1997-04-01	7.6902
1997-07-01	8.5290
1997-10-01	4.1137
1998-01-01	6.6870
1998-04-01	5.5002
1998-07-01	3.2530
1998-10-01	2.2424
1999-01-01	2.8596
1999-04-01	4.0130
1999-07-01	2.6141
1999-10-01	2.8475
2000-01-01	3.2361
2000-04-01	2.9802
2000-07-01	3.2038
2000-10-01	3.9634
2001-01-01	3.2740
2001-04-01	3.0970
2001-07-01	1.4984
2001-10-01	1.2961
2002-01-01	1.1044
2002-04-01	1.6589
2002-07-01	2.1167
2002-10-01	2.8158
2003-01-01	4.7895
2003-04-01	2.6340
2003-07-01	3.4075
2003-10-01	2.3464
2004-01-01	2.7899
2004-04-01	2.6792
2004-07-01	2.6924
2004-10-01	3.8223
2005-01-01	3.3881
2005-04-01	4.2343
2005-07-01	3.5359
2005-10-01	3.9772
2006-01-01	6.6319
2006-04-01	5.8157
2006-07-01	7.4455
2006-10-01	7.9791
2007-01-01	12.4531
2007-04-01	10.2358
2007-07-01	9.9321
2007-10-01	11.2901
2008-01-01	11.9301
2008-04-01	13.2219
2008-07-01	13.7263
2008-10-01	3.9897
2009-01-01	6.3874
2009-04-01	6.8854
2009-07-01	7.2907
2009-10-01	6.1595
2010-01-01	6.8285
2010-04-01	7.4562
2010-07-01	6.1371
2010-10-01	4.9803
2011-01-01	7.0762
2011-04-01	10.9996
2011-07-01	10.1982
2011-10-01	14.3865
2012-01-01	28.7885
2012-04-01	23.9967
2012-07-01	21.4520
2012-10-01	28.5162
2013-01-01	37.6177
2013-04-01	35.6012
2013-07-01	40.1951
2013-10-01	43.9870
2014-01-01	58.6657
2014-04-01	61.7850
2014-07-01	58.3015
2014-10-01	47.8595
2015-01-01	56.4717
2015-04-01	50.4976