Quarter	Millions of US Dollars
1985-01-01	19
1986-07-01	26
1988-04-01	40
1990-01-01	-34
1991-07-01	-32
1994-04-01	14
1994-10-01	30
1996-04-01	0
1996-07-01	0
1997-04-01	-14
1997-10-01	0
1998-04-01	-37
1999-10-01	-30
2000-04-01	100
2001-10-01	150
2005-10-01	125
2006-10-01	65
2010-04-01	-100
2010-07-01	200