Quarter	Billions of US Dollars
1993-07-01	0.19020
1993-10-01	0.22351
1994-01-01	0.24237
1994-04-01	0.25240
1994-07-01	0.55394
1994-10-01	0.55065
1995-01-01	0.57980
1995-04-01	0.59551
1995-07-01	0.55432
1995-10-01	0.34862
1996-01-01	0.34705
1996-04-01	0.45536
1996-07-01	0.45319
1996-10-01	0.44655
1997-01-01	0.43704
1997-04-01	0.44860
1997-07-01	0.69669
1997-10-01	1.01554
1998-01-01	1.00894
1998-04-01	4.98339
1998-07-01	4.99926
1998-10-01	5.02388
1999-01-01	5.00698
1999-04-01	5.00462
1999-07-01	5.05859
1999-10-01	5.07945
2000-01-01	5.06292
2000-04-01	5.06490
2000-07-01	5.05433
2000-10-01	5.02646
2001-01-01	4.99326
2001-04-01	4.94663
2001-07-01	4.96044
2001-10-01	4.92625
2002-01-01	4.92282
2002-04-01	4.95998
2002-07-01	4.86327
2002-10-01	5.22135
2003-01-01	5.22006
2003-04-01	5.22161
2003-07-01	5.33996
2003-10-01	5.24890
2004-01-01	5.26444
2004-04-01	5.24206
2004-07-01	5.92856
2004-10-01	5.85982
2005-01-01	5.84508
2005-04-01	5.83196
2005-07-01	5.82073
2005-10-01	6.70740
2006-01-01	6.72443
2006-04-01	6.71013
2006-07-01	6.70011
2006-10-01	7.71662
2007-01-01	7.73282
2007-04-01	7.73571
2007-07-01	7.64104
2007-10-01	7.30195
2008-01-01	7.40350
2008-04-01	4.39634
2008-07-01	4.26945
2008-10-01	4.24283
2009-01-01	4.18542
2009-04-01	7.25884
2009-07-01	7.30696
2009-10-01	7.23053
2010-01-01	7.14941
2010-04-01	7.04371
2010-07-01	7.16420
2010-10-01	7.13917
2011-01-01	7.21311
2011-04-01	7.23464
2011-07-01	7.15151
2011-10-01	7.10216
2012-01-01	7.13865
2012-04-01	7.07163
2012-07-01	7.10138
2012-10-01	7.12448
2013-01-01	7.09044
2013-04-01	6.11450
2013-07-01	7.08169
2013-10-01	7.10671
2014-01-01	7.10645
2014-04-01	7.61942
2014-07-01	6.44474
2014-10-01	6.37291
2015-01-01	6.14834
2015-04-01	6.21821