Quarter	Billions of US Dollars
1993-07-01	5.8992
1993-10-01	5.6610
1994-01-01	5.8193
1994-04-01	5.4988
1994-07-01	5.3500
1994-10-01	5.0171
1995-01-01	5.2204
1995-04-01	5.2532
1995-07-01	5.2089
1995-10-01	5.2219
1996-01-01	4.3348
1996-04-01	3.6478
1996-07-01	3.4726
1996-10-01	3.7263
1997-01-01	4.0092
1997-04-01	3.8375
1997-07-01	3.5197
1997-10-01	3.7213
1998-01-01	3.8959
1998-04-01	5.0745
1998-07-01	4.9934
1998-10-01	5.2470
1999-01-01	5.6046
1999-04-01	8.0617
1999-07-01	9.0160
1999-10-01	9.3931
2000-01-01	10.1610
2000-04-01	9.0059
2000-07-01	9.9702
2000-10-01	11.2186
2001-01-01	12.5380
2001-04-01	15.9238
2001-07-01	15.7987
2001-10-01	16.4382
2002-01-01	16.3752
2002-04-01	18.3263
2002-07-01	17.5234
2002-10-01	18.4427
2003-01-01	18.5517
2003-04-01	18.7818
2003-07-01	18.3704
2003-10-01	19.1579
2004-01-01	19.1795
2004-04-01	18.9488
2004-07-01	18.3243
2004-10-01	19.3890
2005-01-01	17.2257
2005-04-01	18.8122
2005-07-01	18.7883
2005-10-01	18.3789
2006-01-01	17.9924
2006-04-01	16.2060
2006-07-01	16.0452
2006-10-01	17.2518
2007-01-01	18.9492
2007-04-01	26.1993
2007-07-01	27.1502
2007-10-01	29.2465
2008-01-01	29.3514
2008-04-01	28.4219
2008-07-01	25.8673
2008-10-01	24.6205
2009-01-01	29.5243
2009-04-01	35.1715
2009-07-01	36.2178
2009-10-01	36.4195
2010-01-01	34.9287
2010-04-01	30.3113
2010-07-01	33.1853
2010-10-01	33.6972
2011-01-01	39.7144
2011-04-01	44.9469
2011-07-01	44.1999
2011-10-01	44.2068
2012-01-01	50.6678
2012-04-01	46.7652
2012-07-01	49.4534
2012-10-01	51.1781
2013-01-01	49.8852
2013-04-01	49.0387
2013-07-01	51.4034
2013-10-01	54.2460
2014-01-01	53.2149
2014-04-01	54.5149
2014-07-01	50.3328
2014-10-01	49.8099
2015-01-01	48.1357
2015-04-01	50.4125