Quarter	Billions of US Dollars
1987-01-01	0.2087
1987-04-01	0.0014
1987-07-01	-0.1794
1987-10-01	0.0015
1988-01-01	0.0015
1988-04-01	-0.0485
1988-07-01	0.1516
1988-10-01	0.0199
1989-01-01	0.4569
1989-04-01	-0.0370
1989-07-01	-0.0785
1989-10-01	-0.1975
1990-01-01	0.0520
1990-04-01	-0.5947
1990-07-01	0.5450
1990-10-01	-0.3405
1991-01-01	0.6569
1991-04-01	-0.3994
1991-07-01	-0.1573
1991-10-01	-0.0500
1992-01-01	-0.7768
1992-04-01	-0.3430
1992-07-01	-0.2000
1992-10-01	-0.2000
1993-01-01	-0.1000
1993-04-01	-0.1250
1993-07-01	0.0157
1993-10-01	0.2090
1994-01-01	-0.0805
1994-04-01	0.1303
1994-07-01	0.5414
1994-10-01	-0.0108
1995-01-01	0.2304
1995-04-01	0.5508
1995-07-01	0.0879
1995-10-01	1.5883
1996-01-01	-2.9177
1996-04-01	0.5043
1996-07-01	0.8240
1996-10-01	0.5401
1997-01-01	1.0025
1997-04-01	1.2233
1997-07-01	-0.1102
1997-10-01	0.2014
1998-01-01	-0.1746
1998-04-01	-0.4402
1998-07-01	0.4994
1998-10-01	0.5046
1999-01-01	2.1376
1999-04-01	-0.8307
1999-07-01	1.9927
1999-10-01	0.4856
2000-01-01	-1.9377
2000-04-01	-0.9915
2000-07-01	0.5312
2000-10-01	0.0580
2001-01-01	-0.1063
2001-04-01	0.2118
2001-07-01	0.0935
2001-10-01	0.0890
2002-01-01	1.2780
2002-04-01	1.8103
2002-07-01	1.8841
2002-10-01	-0.0772
2003-01-01	0.9164
2003-04-01	1.3697
2003-07-01	-0.6614
2003-10-01	0.2250
2004-01-01	0.3219
2004-04-01	0.9431
2004-07-01	0.2491
2004-10-01	0.6857
2005-01-01	0.6668
2005-04-01	0.0120
2005-07-01	-0.3829
2005-10-01	-2.3220
2006-01-01	1.2192
2006-04-01	1.3874
2006-07-01	0.1695
2006-10-01	0.1013
2007-01-01	-0.2531
2007-04-01	0.3453
2007-07-01	-0.0154
2007-10-01	-0.9090
2008-01-01	-0.3863
2008-04-01	0.0216
2008-07-01	-0.6257
2008-10-01	-0.0240
2009-01-01	-0.3436
2009-04-01	-1.2285
2009-07-01	-0.1886
2009-10-01	0.1991
2010-01-01	2.9975
2010-04-01	0.3008
2010-07-01	2.6610
2010-10-01	4.4689
2011-01-01	1.4179
2011-04-01	6.3404
2011-07-01	1.0866
2011-10-01	4.7652
2012-01-01	5.8410
2012-04-01	2.4943
2012-07-01	5.5703
2012-10-01	-0.9346
2013-01-01	2.9376
2013-04-01	5.9990
2013-07-01	1.1260
2013-10-01	7.5691
2014-01-01	5.5674
2014-04-01	10.4468
2014-07-01	5.0528
2014-10-01	0.8472
2015-01-01	5.8184
2015-04-01	-2.0405