Quarter	Billions of US Dollars
1993-07-01	3.4019
1993-10-01	3.5490
1994-01-01	2.9251
1994-04-01	3.0747
1994-07-01	3.6444
1994-10-01	2.4815
1995-01-01	2.1955
1995-04-01	3.3341
1995-07-01	3.1164
1995-10-01	3.7465
1996-01-01	3.9205
1996-04-01	3.5880
1996-07-01	4.4955
1996-10-01	3.4601
1997-01-01	4.1322
1997-04-01	3.7473
1997-07-01	4.3636
1997-10-01	4.0805
1998-01-01	5.1975
1998-04-01	2.6962
1998-07-01	3.5897
1998-10-01	4.3952
1999-01-01	4.8967
1999-04-01	3.5849
1999-07-01	5.0725
1999-10-01	4.5914
2000-01-01	7.4983
2000-04-01	5.6321
2000-07-01	5.8896
2000-10-01	4.9766
2001-01-01	7.5048
2001-04-01	5.3906
2001-07-01	5.8646
2001-10-01	6.1349
2002-01-01	7.7891
2002-04-01	6.7760
2002-07-01	9.2272
2002-10-01	8.0175
2003-01-01	8.5344
2003-04-01	7.4347
2003-07-01	5.3968
2003-10-01	7.2535
2004-01-01	8.8525
2004-04-01	8.8026
2004-07-01	12.7640
2004-10-01	12.9521
2005-01-01	15.9408
2005-04-01	8.4794
2005-07-01	10.5083
2005-10-01	10.7343
2006-01-01	17.2439
2006-04-01	18.9880
2006-07-01	20.4066
2006-10-01	19.6907
2007-01-01	16.7021
2007-04-01	16.5557
2007-07-01	16.2136
2007-10-01	14.9212
2008-01-01	17.5883
2008-04-01	23.3428
2008-07-01	21.1208
2008-10-01	15.2973
2009-01-01	13.3789
2009-04-01	15.5260
2009-07-01	16.8123
2009-10-01	14.3136
2010-01-01	13.6740
2010-04-01	13.1108
2010-07-01	13.4945
2010-10-01	11.1578
2011-01-01	14.0786
2011-04-01	17.9620
2011-07-01	21.4236
2011-10-01	17.5111
2012-01-01	19.4968
2012-04-01	20.2141
2012-07-01	20.9630
2012-10-01	18.3774
2013-01-01	16.1381
2013-04-01	13.5799
2013-07-01	16.9443
2013-10-01	12.9915
2014-01-01	20.2463
2014-04-01	17.9025
2014-07-01	20.3155
2014-10-01	14.3272
2015-01-01	12.9841
2015-04-01	14.4655