Quarter	Billions of US Dollars
1993-07-01	-1.8698
1993-10-01	0.5747
1994-01-01	3.2167
1994-04-01	-0.9345
1994-07-01	-2.0323
1994-10-01	-0.0196
1995-01-01	-1.1180
1995-04-01	0.2217
1995-07-01	0.8568
1995-10-01	2.5371
1996-01-01	0.9370
1996-04-01	1.8997
1996-07-01	2.5366
1996-10-01	2.3678
1997-01-01	2.3088
1997-04-01	4.0956
1997-07-01	2.6075
1997-10-01	1.5759
1998-01-01	4.9341
1998-04-01	3.0257
1998-07-01	7.6915
1998-10-01	1.8208
1999-01-01	0.7084
1999-04-01	4.0224
1999-07-01	3.4818
1999-10-01	0.8931
2000-01-01	1.0043
2000-04-01	0.6067
2000-07-01	3.7549
2000-10-01	3.8722
2001-01-01	4.1271
2001-04-01	2.1330
2001-07-01	3.7116
2001-10-01	3.6910
2002-01-01	-0.1655
2002-04-01	5.9308
2002-07-01	-2.4638
2002-10-01	-1.5361
2003-01-01	4.9244
2003-04-01	-0.1495
2003-07-01	1.4468
2003-10-01	3.7774
2004-01-01	-1.5376
2004-04-01	0.8856
2004-07-01	-2.8453
2004-10-01	0.2635
2005-01-01	4.1693
2005-04-01	-0.6204
2005-07-01	-7.4799
2005-10-01	-1.7994
2006-01-01	3.7089
2006-04-01	2.0745
2006-07-01	-2.9091
2006-10-01	4.2679
2007-01-01	-1.1238
2007-04-01	8.8444
2007-07-01	3.7650
2007-10-01	2.4753
2008-01-01	-7.3065
2008-04-01	10.2488
2008-07-01	-9.6892
2008-10-01	1.4808
2009-01-01	-3.8292
2009-04-01	-4.6677
2009-07-01	-1.8327
2009-10-01	0.9843
2010-01-01	1.4875
2010-04-01	-0.5284
2010-07-01	4.1022
2010-10-01	-0.6979
2011-01-01	1.1942
2011-04-01	-4.4145
2011-07-01	1.7532
2011-10-01	-1.2318
2012-01-01	2.7987
2012-04-01	-5.8138
2012-07-01	1.8101
2012-10-01	-4.2023
2013-01-01	-1.8734
2013-04-01	3.3262
2013-07-01	3.4882
2013-10-01	9.3882
2014-01-01	4.3220
2014-04-01	0.5831
2014-07-01	0.6361
2014-10-01	0.4382
2015-01-01	-1.4934
2015-04-01	0.0664