Quarter	Millions of US Dollars
1996-07-01	290
1999-04-01	152
2001-10-01	0
2002-01-01	0
2002-07-01	-225
2003-07-01	465
2004-04-01	-167
2007-04-01	671
2008-07-01	-601
2010-10-01	1347
2012-10-01	1500
2014-04-01	1354
2016-10-01	313
2017-04-01	-551