Quarter	Millions of US Dollars
1997-01-01	11
2000-01-01	-13
2001-04-01	134
2001-10-01	114
2002-10-01	440
2004-04-01	-181
2004-10-01	-46
2005-04-01	-46
2005-10-01	-46
2006-04-01	-46
2006-10-01	-207
2007-04-01	-46
2007-10-01	-219