Quarter	Billions of US Dollars
1993-07-01	4.2701
1993-10-01	4.0143
1994-01-01	5.8071
1994-04-01	6.4513
1994-07-01	7.0289
1994-10-01	7.4794
1995-01-01	8.3492
1995-04-01	8.8180
1995-07-01	7.6907
1995-10-01	7.4054
1996-01-01	7.1933
1996-04-01	9.2350
1996-07-01	10.9579
1996-10-01	12.8793
1997-01-01	12.2773
1997-04-01	14.6416
1997-07-01	16.0122
1997-10-01	14.5247
1998-01-01	14.7181
1998-04-01	13.1169
1998-07-01	12.8467
1998-10-01	15.2381
1999-01-01	15.3847
1999-04-01	15.2504
1999-07-01	17.7148
1999-10-01	18.1098
2000-01-01	16.9941
2000-04-01	17.6039
2000-07-01	16.1387
2000-10-01	16.0275
2001-01-01	14.6112
2001-04-01	14.6340
2001-07-01	15.1723
2001-10-01	13.8168
2002-01-01	11.8023
2002-04-01	17.1757
2002-07-01	16.8401
2002-10-01	17.3192
2003-01-01	20.3341
2003-04-01	20.7830
2003-07-01	22.9521
2003-10-01	30.6068
2004-01-01	35.0220
2004-04-01	38.4166
2004-07-01	39.6076
2004-10-01	43.8507
2005-01-01	42.0729
2005-04-01	41.2349
2005-07-01	37.9783
2005-10-01	37.1934
2006-01-01	36.8446
2006-04-01	42.2363
2006-07-01	41.3164
2006-10-01	45.3165
2007-01-01	45.1402
2007-04-01	43.3653
2007-07-01	47.7004
2007-10-01	47.4726
2008-01-01	55.0565
2008-04-01	53.9181
2008-07-01	56.0765
2008-10-01	60.1084
2009-01-01	53.1011
2009-04-01	48.7921
2009-07-01	50.3146
2009-10-01	48.8621
2010-01-01	46.0286
2010-04-01	46.6224
2010-07-01	50.9906
2010-10-01	50.9507
2011-01-01	45.8627
2011-04-01	40.5076
2011-07-01	38.4524
2011-10-01	37.5030
2012-01-01	35.7431
2012-04-01	36.9971
2012-07-01	37.4537
2012-10-01	34.8704
2013-01-01	29.8030
2013-04-01	28.4417
2013-07-01	31.0823
2013-10-01	31.4670
2014-01-01	32.0874
2014-04-01	36.2967
2014-07-01	33.9833
2014-10-01	32.9151
2015-01-01	32.3484
2015-04-01	33.1629