Quarter	Billions of US Dollars
1993-07-01	1.827
1993-10-01	2.699
1994-01-01	2.554
1994-04-01	1.167
1994-07-01	2.512
1994-10-01	-0.342
1995-01-01	-0.932
1995-04-01	1.122
1995-07-01	0.534
1995-10-01	-0.902
1996-01-01	3.271
1996-04-01	2.108
1996-07-01	-0.238
1996-10-01	6.824
1997-01-01	2.148
1997-04-01	0.804
1997-07-01	4.738
1997-10-01	4.700
1998-01-01	1.691
1998-04-01	3.648
1998-07-01	-2.645
1998-10-01	4.091
1999-01-01	1.736
1999-04-01	6.169
1999-07-01	4.123
1999-10-01	5.104
2000-01-01	1.283
2000-04-01	7.323
2000-07-01	8.426
2000-10-01	6.228
2001-01-01	2.845
2001-04-01	2.128
2001-07-01	6.022
2001-10-01	5.170
2002-01-01	-1.321
2002-04-01	7.503
2002-07-01	1.127
2002-10-01	3.796
2003-01-01	1.131
2003-04-01	5.595
2003-07-01	8.009
2003-10-01	5.442
2004-01-01	16.061
2004-04-01	14.578
2004-07-01	6.496
2004-10-01	19.068
2005-01-01	15.914
2005-04-01	18.827
2005-07-01	19.043
2005-10-01	40.022
2006-01-01	23.443
2006-04-01	11.817
2006-07-01	15.023
2006-10-01	49.380
2007-01-01	28.719
2007-04-01	25.362
2007-07-01	22.257
2007-10-01	16.437
2008-01-01	-4.139
2008-04-01	123.025
2008-07-01	152.459
2008-10-01	198.965
2009-01-01	56.543
2009-04-01	5.983
2009-07-01	32.102
2009-10-01	-12.230
2010-01-01	-5.085
2010-04-01	-25.722
2010-07-01	5.407
2010-10-01	-25.002
2011-01-01	-27.843
2011-04-01	1.690
2011-07-01	-27.063
2011-10-01	-19.988
2012-01-01	-11.496
2012-04-01	-44.131
2012-07-01	-8.074
2012-10-01	-3.410
2013-01-01	12.052
2013-04-01	-9.908
2013-07-01	-5.890
2013-10-01	9.725
2014-01-01	-13.039
2014-04-01	5.611
2014-07-01	15.373
2014-10-01	-13.868
2015-01-01	-15.150
2015-04-01	0.433