Quarter	Millions of US Dollars
1983-04-01	21
1983-07-01	20
1984-04-01	22
1984-10-01	102
1985-10-01	97
1990-07-01	-34
1990-10-01	-191
1991-04-01	-36
1993-04-01	-45
1993-10-01	47
1994-07-01	300
1995-10-01	-197
1996-04-01	110
1997-07-01	265
1997-10-01	350
1998-04-01	4000
1998-10-01	-42
2001-04-01	-49
2002-07-01	-92
2002-10-01	343
2003-04-01	0
2003-07-01	70
2003-10-01	-115
2004-07-01	700
2004-10-01	-104
2005-10-01	916
2006-04-01	-52
2006-10-01	994
2007-07-01	-170
2007-10-01	-388
2008-04-01	-3000
2009-04-01	3000
2009-10-01	-56
2013-04-01	-1000
2013-07-01	930
2014-04-01	521
2014-07-01	-1000
2015-10-01	382
2016-10-01	-500
2017-01-01	1000