Quarter	Billions of US Dollars
1993-07-01	12.3688
1993-10-01	11.8278
1994-01-01	12.7404
1994-04-01	12.4197
1994-07-01	13.4566
1994-10-01	12.5578
1995-01-01	11.8389
1995-04-01	12.1285
1995-07-01	11.2341
1995-10-01	12.5380
1996-01-01	13.9760
1996-04-01	15.5837
1996-07-01	14.6435
1996-10-01	13.7101
1997-01-01	16.2146
1997-04-01	18.2534
1997-07-01	17.1633
1997-10-01	16.8875
1998-01-01	18.5979
1998-04-01	19.2573
1998-07-01	20.2990
1998-10-01	21.7372
1999-01-01	22.1998
1999-04-01	23.7867
1999-07-01	24.1156
1999-10-01	27.6397
2000-01-01	24.2357
2000-04-01	26.9418
2000-07-01	29.0045
2000-10-01	37.7745
2001-01-01	32.7809
2001-04-01	36.1889
2001-07-01	37.8118
2001-10-01	33.3315
2002-01-01	34.3778
2002-04-01	33.9676
2002-07-01	33.0090
2002-10-01	32.9650
2003-01-01	36.2757
2003-04-01	40.2552
2003-07-01	35.9872
2003-10-01	40.1588
2004-01-01	38.5394
2004-04-01	38.2264
2004-07-01	37.5883
2004-10-01	39.8366
2005-01-01	38.5637
2005-04-01	39.3743
2005-07-01	34.3331
2005-10-01	33.1567
2006-01-01	40.6043
2006-04-01	47.5956
2006-07-01	43.9220
2006-10-01	38.1963
2007-01-01	42.8786
2007-04-01	43.5259
2007-07-01	41.6500
2007-10-01	35.6066
2008-01-01	46.1857
2008-04-01	53.1448
2008-07-01	50.1969
2008-10-01	53.3188
2009-01-01	38.6930
2009-04-01	41.5968
2009-07-01	36.2231
2009-10-01	27.2630
2010-01-01	27.1654
2010-04-01	27.8078
2010-07-01	23.9096
2010-10-01	21.9795
2011-01-01	24.7154
2011-04-01	34.6557
2011-07-01	29.4555
2011-10-01	27.8903
2012-01-01	25.4674
2012-04-01	32.4525
2012-07-01	27.0509
2012-10-01	24.2730
2013-01-01	30.4698
2013-04-01	36.7551
2013-07-01	38.2218
2013-10-01	31.5498
2014-01-01	35.3218
2014-04-01	39.1012
2014-07-01	37.4881
2014-10-01	38.2585
2015-01-01	43.0773
2015-04-01	48.7633