Quarter	Millions of US Dollars
1996-10-01	200
1998-07-01	169
1998-10-01	0
1999-01-01	0
1999-04-01	0
1999-07-01	-63
1999-10-01	161
2000-01-01	-10
2000-04-01	138
2000-07-01	86
2000-10-01	0
2001-07-01	-80
2002-04-01	143
2004-10-01	-259
2006-10-01	-200
2007-04-01	-270
2013-10-01	2528
2014-04-01	1050
2018-01-01	387