Quarter	Billions of US Dollars
1993-04-01	0.07100
1993-07-01	1.71725
1993-10-01	0.52991
1994-01-01	0.43556
1994-04-01	0.59041
1994-07-01	0.79381
1994-10-01	-0.25849
1995-01-01	1.00306
1995-04-01	0.17198
1995-07-01	0.41873
1995-10-01	2.14654
1996-01-01	0.69933
1996-04-01	0.75927
1996-07-01	0.72452
1996-10-01	1.46235
1997-01-01	-0.14312
1997-04-01	0.67604
1997-07-01	-0.58783
1997-10-01	-0.28667
1998-01-01	-0.31288
1998-04-01	-0.95286
1998-07-01	-0.86621
1998-10-01	1.21520
1999-01-01	1.32476
1999-04-01	-1.14417
1999-07-01	0.37025
1999-10-01	-1.09481
2000-01-01	1.93297
2000-04-01	-0.92606
2000-07-01	0.75534
2000-10-01	0.06077
2001-01-01	1.36361
2001-04-01	-0.65965
2001-07-01	0.51910
2001-10-01	1.76004
2002-01-01	-0.28608
2002-04-01	-0.67892
2002-07-01	1.16140
2002-10-01	1.32834
2003-01-01	2.01601
2003-04-01	-0.31007
2003-07-01	-0.29623
2003-10-01	1.85311
2004-01-01	-1.74551
2004-04-01	-2.12962
2004-07-01	0.17222
2004-10-01	-4.07844
2005-01-01	0.74370
2005-04-01	2.95716
2005-07-01	0.59970
2005-10-01	-0.21725
2006-01-01	0.32330
2006-04-01	1.09504
2006-07-01	0.07413
2006-10-01	0.87507
2007-01-01	2.07417
2007-04-01	1.41608
2007-07-01	-0.25726
2007-10-01	1.80278
2008-01-01	-0.57633
2008-04-01	0.07078
2008-07-01	0.72801
2008-10-01	-4.45261
2009-01-01	1.86305
2009-04-01	-5.56215
2009-07-01	1.90325
2009-10-01	-2.25393
2010-01-01	-2.06482
2010-04-01	0.46381
2010-07-01	-2.23583
2010-10-01	-3.45706
2011-01-01	-1.68817
2011-04-01	2.76547
2011-07-01	-3.01492
2011-10-01	-0.35614
2012-01-01	3.42277
2012-04-01	-3.65255
2012-07-01	-2.13454
2012-10-01	-1.27161
2013-01-01	-1.58375
2013-04-01	-0.11276
2013-07-01	0.20900
2013-10-01	0.22298
2014-01-01	-0.47131
2014-04-01	0.05957
2014-07-01	-1.58225
2014-10-01	-0.45378
2015-01-01	-1.34901
2015-04-01	0.50019