Quarter	Millions of US Dollars
2006-10-01	92
2007-04-01	19
2007-10-01	-101
2008-01-01	3
2010-04-01	-16
2010-07-01	1000
2010-10-01	225
2011-01-01	797
2012-10-01	-225
2015-07-01	-1000
2017-04-01	2600
2017-10-01	700
2018-01-01	-200