Quarter	Billions of US Dollars
1993-07-01	0.28600
1993-10-01	0.00150
1994-01-01	0.06229
1994-04-01	-0.02418
1994-07-01	-0.07593
1994-10-01	-0.02300
1995-01-01	0.03600
1995-04-01	0.54113
1995-07-01	0.91558
1995-10-01	0.68490
1996-01-01	0.02249
1996-04-01	0.26477
1996-07-01	1.69630
1996-10-01	1.41970
1997-01-01	-0.51472
1997-04-01	-0.55795
1997-07-01	-0.79485
1997-10-01	-1.86269
1998-01-01	-0.33277
1998-04-01	0.19055
1998-07-01	-0.47025
1998-10-01	-0.10079
1999-01-01	0.10369
1999-04-01	-0.32305
1999-07-01	-0.10532
1999-10-01	0.16600
2000-01-01	0.21747
2000-04-01	0.35343
2000-07-01	0.33548
2000-10-01	0.08425
2001-01-01	-0.52054
2001-04-01	0.16799
2001-07-01	-0.40513
2001-10-01	-0.19666
2002-01-01	-0.22453
2002-04-01	0.40984
2002-07-01	1.33773
2002-10-01	-0.22773
2003-01-01	0.19350
2003-04-01	-0.43248
2003-07-01	-0.26141
2003-10-01	0.33604
2004-01-01	-0.13093
2004-04-01	-0.42673
2004-07-01	-0.24711
2004-10-01	0.47852
2005-01-01	0.15690
2005-04-01	0.54877
2005-07-01	-0.54341
2005-10-01	0.12563
2006-01-01	0.51116
2006-04-01	0.76298
2006-07-01	1.17725
2006-10-01	-0.35128
2007-01-01	0.76587
2007-04-01	0.42384
2007-07-01	1.04066
2007-10-01	-0.01256
2008-01-01	0.54504
2008-04-01	1.33975
2008-07-01	0.14317
2008-10-01	-4.76388
2009-01-01	0.66581
2009-04-01	2.21521
2009-07-01	0.49055
2009-10-01	-0.01888
2010-01-01	-0.35287
2010-04-01	-0.23428
2010-07-01	-0.31398
2010-10-01	-1.71425
2011-01-01	0.24185
2011-04-01	0.20997
2011-07-01	0.74405
2011-10-01	1.21950
2012-01-01	0.15517
2012-04-01	0.44346
2012-07-01	0.32973
2012-10-01	-1.36331
2013-01-01	0.02954
2013-04-01	0.27893
2013-07-01	1.10733
2013-10-01	0.77179
2014-01-01	0.73508
2014-04-01	-0.70994
2014-07-01	-1.04727
2014-10-01	1.00938
2015-01-01	1.15472
2015-04-01	1.38755