Quarter	Billions of US Dollars
1990-04-01	0.2000
1991-04-01	0.3738
1993-07-01	0.6590
1993-10-01	-0.0455
1994-01-01	-0.3815
1994-04-01	-0.4380
1994-07-01	-0.1680
1994-10-01	0.0454
1995-01-01	0.0610
1995-04-01	0.1900
1995-07-01	0.1107
1995-10-01	-0.1322
1996-01-01	-0.1706
1996-04-01	0.0384
1996-07-01	0.0861
1996-10-01	-0.2429
1997-01-01	0.1604
1997-04-01	0.2316
1997-07-01	0.0889
1997-10-01	-0.1962
1998-01-01	-0.1135
1998-04-01	0.0303
1998-07-01	0.0780
1998-10-01	-0.0070
1999-01-01	1.0355
1999-04-01	0.0667
1999-07-01	2.8742
1999-10-01	2.9421
2000-01-01	-1.2478
2000-04-01	0.9801
2000-07-01	1.6636
2000-10-01	-0.3830
2001-01-01	-0.2096
2001-04-01	2.2334
2001-07-01	0.3144
2001-10-01	0.8457
2002-01-01	2.1935
2002-07-01	2.3647
2002-10-01	5.9272
2003-01-01	7.6587
2003-04-01	5.6931
2003-07-01	6.2940
2003-10-01	6.0977
2004-01-01	9.3251
2004-04-01	-0.1204
2004-07-01	0.5841
2004-10-01	8.6614
2005-01-01	14.7564
2005-04-01	22.7913
2005-07-01	3.1154
2005-10-01	32.1600
2006-01-01	40.0004
2006-04-01	19.0947
2006-07-01	16.6587
2006-10-01	6.6590
2007-01-01	34.9074
2007-04-01	21.7980
2007-07-01	4.6844
2007-10-01	1.1962
2008-01-01	-9.1695
2008-04-01	31.0189
2008-07-01	14.5973
2008-10-01	-19.9249
2009-01-01	2.9753
2009-04-01	-1.3644
2009-07-01	-3.6559
2009-10-01	9.1936
2010-01-01	-6.8783
2010-04-01	-23.5472
2010-07-01	12.0745
2010-10-01	-8.2860
2011-01-01	-11.5275
2011-04-01	-22.6878
2011-07-01	-6.2458
2011-10-01	-8.0372
2012-01-01	0.9930
2012-04-01	-28.9011
2012-07-01	-9.6385
2012-10-01	-7.1931
2013-01-01	-8.9757
2013-04-01	-1.8562
2013-07-01	-15.8564
2013-10-01	0.5541
2014-01-01	-6.2382
2014-04-01	3.5386
2014-07-01	-5.7897
2014-10-01	-6.9253
2015-01-01	-0.5890
2015-04-01	-6.4458