Quarter	Millions of US Dollars
1993-07-01	30
1993-10-01	73
1994-01-01	-58
1994-04-01	-38
1994-07-01	-7
1999-07-01	18
2006-10-01	52
2007-10-01	46
2008-07-01	57
2012-07-01	253
2013-07-01	-57
2015-01-01	-18