Quarter	Billions of US Dollars
1993-07-01	0.21063
1993-10-01	0.28185
1994-01-01	0.06408
1994-04-01	0.15075
1994-07-01	-0.14199
1994-10-01	0.62713
1995-01-01	-0.51333
1995-04-01	0.02130
1995-07-01	0.38062
1995-10-01	0.32568
1996-01-01	0.92029
1996-04-01	0.69681
1996-07-01	-0.78881
1996-10-01	0.21207
1997-01-01	0.10117
1997-04-01	0.09836
1997-07-01	0.18878
1997-10-01	-0.10185
1998-01-01	0.50614
1998-04-01	0.60169
1998-07-01	-0.62036
1998-10-01	-0.99957
1999-01-01	-0.46613
1999-04-01	0.27901
1999-07-01	-0.43757
1999-10-01	-0.13023
2000-01-01	0.25291
2000-04-01	0.11637
2000-07-01	-0.11758
2000-10-01	-0.24635
2001-01-01	-0.21276
2001-04-01	-0.30118
2001-07-01	-0.26513
2001-10-01	-0.02914
2002-01-01	0.09046
2002-04-01	-0.39953
2002-07-01	-0.03595
2002-10-01	0.15334
2003-01-01	0.51072
2003-04-01	0.18101
2003-07-01	-0.25828
2003-10-01	-0.16498
2004-01-01	0.00667
2004-04-01	-0.39640
2004-07-01	-0.07290
2004-10-01	0.03591
2005-01-01	0.21589
2005-04-01	-0.08204
2005-07-01	-0.11754
2005-10-01	-0.03511
2006-01-01	0.00924
2006-04-01	0.11153
2006-07-01	-0.01840
2006-10-01	0.10523
2007-01-01	0.09254
2007-04-01	0.58776
2007-07-01	0.06292
2007-10-01	0.01177
2008-01-01	-0.03329
2008-04-01	0.12266
2008-07-01	0.56143
2008-10-01	-0.33281
2009-01-01	-0.15523
2009-04-01	0.10032
2009-07-01	-0.33889
2009-10-01	-0.29796
2010-01-01	0.12804
2010-04-01	-0.15588
2010-07-01	0.10541
2010-10-01	0.22936
2011-01-01	0.00701
2011-04-01	1.28005
2011-07-01	0.84110
2011-10-01	0.91900
2012-01-01	0.10037
2012-04-01	0.27816
2012-07-01	-1.26234
2012-10-01	-0.19305
2013-01-01	0.66425
2013-04-01	-1.85023
2013-07-01	-0.22919
2013-10-01	-0.19151
2014-01-01	-0.34282
2014-04-01	-0.27834
2014-07-01	-0.38210
2014-10-01	-0.05198
2015-01-01	0.75258
2015-04-01	0.62396