Quarter	Billions of US Dollars
1993-07-01	6.0628
1993-10-01	8.1696
1994-01-01	8.8520
1994-04-01	9.4436
1994-07-01	9.8884
1994-10-01	9.8485
1995-01-01	10.0887
1995-04-01	11.2409
1995-07-01	11.1588
1995-10-01	11.1194
1996-01-01	11.8426
1996-04-01	12.8227
1996-07-01	13.5539
1996-10-01	13.8902
1997-01-01	14.3309
1997-04-01	16.0919
1997-07-01	17.5333
1997-10-01	17.9228
1998-01-01	17.7961
1998-04-01	17.3719
1998-07-01	17.1642
1998-10-01	17.1786
1999-01-01	16.6972
1999-04-01	16.6520
1999-07-01	17.1087
1999-10-01	17.3551
2000-01-01	17.1901
2000-04-01	17.8657
2000-07-01	18.4649
2000-10-01	18.0619
2001-01-01	17.6836
2001-04-01	18.5879
2001-07-01	18.7439
2001-10-01	18.7076
2002-01-01	19.5792
2002-04-01	20.1504
2002-07-01	20.1601
2002-10-01	19.5472
2003-01-01	19.4665
2003-04-01	19.9583
2003-07-01	20.3908
2003-10-01	20.0397
2004-01-01	20.5020
2004-04-01	22.8389
2004-07-01	22.6433
2004-10-01	22.5763
2005-01-01	22.3512
2005-04-01	22.6774
2005-07-01	23.9390
2005-10-01	24.9999
2006-01-01	25.2108
2006-04-01	25.8898
2006-07-01	27.3731
2006-10-01	27.7340
2007-01-01	26.6951
2007-04-01	27.4634
2007-07-01	26.5220
2007-10-01	27.1247
2008-01-01	27.0273
2008-04-01	27.4387
2008-07-01	27.0175
2008-10-01	26.9443
2009-01-01	27.5056
2009-04-01	29.7171
2009-07-01	31.8183
2009-10-01	33.1031
2010-01-01	32.7685
2010-04-01	32.8396
2010-07-01	33.3284
2010-10-01	36.6213
2011-01-01	37.8225
2011-04-01	40.7130
2011-07-01	41.4382
2011-10-01	41.5529
2012-01-01	42.8976
2012-04-01	45.6612
2012-07-01	47.9999
2012-10-01	47.2176
2013-01-01	48.2147
2013-04-01	46.8358
2013-07-01	50.0378
2013-10-01	54.2125
2014-01-01	55.7621
2014-04-01	55.6259
2014-07-01	55.9611
2014-10-01	57.2449
2015-01-01	56.3517
2015-04-01	56.3682