Quarter	Billions of US Dollars
1993-07-01	4.6160
1993-10-01	4.4964
1994-01-01	3.2886
1994-04-01	3.9547
1994-07-01	4.5711
1994-10-01	3.9743
1995-01-01	4.2942
1995-04-01	2.9707
1995-07-01	3.3569
1995-10-01	5.0267
1996-01-01	5.5061
1996-04-01	5.0053
1996-07-01	3.5798
1996-10-01	3.7840
1997-01-01	3.9789
1997-04-01	3.7933
1997-07-01	4.3037
1997-10-01	4.4835
1998-01-01	4.6746
1998-04-01	5.1600
1998-07-01	5.1577
1998-10-01	5.8679
1999-01-01	5.1838
1999-04-01	5.3178
1999-07-01	7.1839
1999-10-01	7.6446
2000-01-01	7.2031
2000-04-01	7.6326
2000-07-01	9.5898
2000-10-01	9.7901
2001-01-01	9.2860
2001-04-01	8.5146
2001-07-01	8.9291
2001-10-01	10.9534
2002-01-01	11.3354
2002-04-01	12.8044
2002-07-01	11.7332
2002-10-01	12.1905
2003-01-01	11.4459
2003-04-01	10.4072
2003-07-01	9.5133
2003-10-01	10.5209
2004-01-01	14.4164
2004-04-01	15.2550
2004-07-01	19.7318
2004-10-01	20.8888
2005-01-01	18.5863
2005-04-01	16.5001
2005-07-01	16.0919
2005-10-01	19.4947
2006-01-01	20.1570
2006-04-01	26.0462
2006-07-01	25.7033
2006-10-01	27.4107
2007-01-01	29.2800
2007-04-01	33.5637
2007-07-01	34.9431
2007-10-01	38.0256
2008-01-01	39.4166
2008-04-01	38.8306
2008-07-01	40.8126
2008-10-01	40.6771
2009-01-01	36.4049
2009-04-01	35.6149
2009-07-01	35.8660
2009-10-01	36.1058
2010-01-01	39.8835
2010-04-01	39.9595
2010-07-01	45.5682
2010-10-01	47.3133
2011-01-01	55.6688
2011-04-01	49.7833
2011-07-01	57.9747
2011-10-01	52.4142
2012-01-01	48.7172
2012-04-01	42.5447
2012-07-01	41.1634
2012-10-01	42.8925
2013-01-01	47.6790
2013-04-01	48.6033
2013-07-01	41.2594
2013-10-01	39.6564
2014-01-01	34.2649
2014-04-01	32.9293
2014-07-01	31.8291
2014-10-01	30.4828
2015-01-01	28.0541
2015-04-01	28.2103