Quarter	Millions of US Dollars
1993-10-01	94
1994-04-01	45
1994-10-01	150
1996-04-01	150
1996-07-01	100
1997-01-01	150
1997-04-01	300
1999-10-01	435
2000-01-01	-419
2000-04-01	-12
2000-10-01	-91
2001-04-01	-45
2001-07-01	-100
2001-10-01	-150
2002-01-01	-19
2002-04-01	0
2002-10-01	-146
2003-10-01	-146
2004-01-01	500
2004-10-01	-146
2005-01-01	600
2005-10-01	-146
2006-01-01	800
2007-04-01	750
2009-01-01	-500
2010-01-01	-600
2014-04-01	2000
2014-10-01	1000
2015-07-01	500
2016-01-01	-500
2016-10-01	2000
2017-04-01	-750
2017-10-01	2500