Quarter	Billions of US Dollars
1993-07-01	0.15494
1993-10-01	0.01245
1994-01-01	0.05866
1994-04-01	-0.03450
1994-07-01	0.05846
1994-10-01	0.00400
1995-01-01	-0.00222
1995-04-01	0.00800
1995-07-01	-0.00816
1995-10-01	0.09800
1996-01-01	0.00789
1996-04-01	-0.01000
1996-07-01	0.00789
1996-10-01	0.01210
1997-01-01	-0.00910
1997-04-01	-0.01450
1997-07-01	-0.02049
1997-10-01	-0.15342
1998-01-01	0.05380
1998-04-01	0.04650
1998-07-01	-0.01298
1998-10-01	-0.18350
1999-01-01	-0.01284
1999-04-01	0.21000
1999-07-01	-0.01634
1999-10-01	-0.10250
2000-01-01	0.02216
2000-04-01	-0.02900
2000-07-01	-0.00934
2000-10-01	-0.00516
2001-01-01	0.03533
2001-04-01	-0.06700
2001-07-01	-0.09884
2005-07-01	0.80386
2005-10-01	0.62200
2006-01-01	0.98512
2006-04-01	-0.51505
2006-07-01	1.16846
2006-10-01	1.77242
2007-01-01	1.12292
2007-04-01	0.02340
2007-07-01	-0.73167
2007-10-01	-2.03058
2008-01-01	1.35217
2008-04-01	-0.56421
2008-07-01	0.44194
2008-10-01	-3.36250
2009-01-01	-0.10460
2009-04-01	-0.05546
2009-07-01	0.13229
2009-10-01	-0.13901
2010-01-01	-0.57771
2010-04-01	-0.21823
2010-07-01	0.03300
2010-10-01	-0.17941
2011-01-01	0.20796
2011-04-01	-0.02547
2011-07-01	0.48040
2011-10-01	-0.14716
2012-01-01	1.28605
2012-04-01	0.73562
2012-07-01	0.08796
2012-10-01	0.48808
2013-01-01	0.69305
2013-04-01	0.93693
2013-07-01	0.71632
2013-10-01	0.56349
2014-01-01	-0.84083
2014-04-01	1.10193
2014-07-01	0.33323
2014-10-01	0.18157
2015-01-01	0.12064
2015-04-01	0.38892