Quarter	Millions of US Dollars
1982-04-01	32
1989-04-01	-38
2007-10-01	950
2012-10-01	-200
2013-07-01	1000
2014-07-01	2000
2015-10-01	2000
2016-07-01	750
2017-10-01	-750
2018-04-01	2000