Quarter	Billions of US Dollars
1993-07-01	2.8941
1993-10-01	2.5030
1994-01-01	2.4920
1994-04-01	1.9791
1994-07-01	2.3914
1994-10-01	1.7685
1995-01-01	2.2556
1995-04-01	2.8295
1995-07-01	2.5306
1995-10-01	2.4191
1996-01-01	3.4226
1996-04-01	2.2205
1996-07-01	3.6722
1996-10-01	3.5465
1997-01-01	4.0945
1997-04-01	4.2157
1997-07-01	3.7244
1997-10-01	2.4624
1998-01-01	2.8756
1998-04-01	2.1893
1998-07-01	3.3609
1998-10-01	2.1665
1999-01-01	2.0250
1999-04-01	1.7918
1999-07-01	2.2990
1999-10-01	3.4090
2000-01-01	4.6899
2000-04-01	4.4990
2000-07-01	4.4712
2000-10-01	4.9194
2001-01-01	5.4804
2001-04-01	2.7886
2001-07-01	2.0413
2001-10-01	1.9338
2002-01-01	1.7961
2002-04-01	3.4451
2002-07-01	3.2912
2002-10-01	2.9518
2003-01-01	2.8807
2003-04-01	2.4020
2003-07-01	3.2227
2003-10-01	4.0180
2004-01-01	6.5499
2004-04-01	4.3638
2004-07-01	5.0985
2004-10-01	4.7405
2005-01-01	6.2919
2005-04-01	4.2320
2005-07-01	5.5264
2005-10-01	5.6554
2006-01-01	8.9447
2006-04-01	9.6370
2006-07-01	7.3154
2006-10-01	9.5767
2007-01-01	15.7118
2007-04-01	10.2984
2007-07-01	8.6839
2007-10-01	13.8537
2008-01-01	12.3369
2008-04-01	10.7123
2008-07-01	18.6911
2008-10-01	5.9795
2009-01-01	7.1068
2009-04-01	7.6237
2009-07-01	7.5374
2009-10-01	5.3753
2010-01-01	8.6178
2010-04-01	6.8347
2010-07-01	8.0962
2010-10-01	8.5538
2011-01-01	7.9670
2011-04-01	11.2159
2011-07-01	7.3331
2011-10-01	6.4062
2012-01-01	8.1204
2012-04-01	10.7646
2012-07-01	7.1191
2012-10-01	7.8749
2013-01-01	11.2529
2013-04-01	11.5546
2013-07-01	9.1107
2013-10-01	10.9557
2014-01-01	17.4803
2014-04-01	13.6137
2014-07-01	10.1231
2014-10-01	9.9292
2015-01-01	12.7087
2015-04-01	12.2045