Quarter	Millions of US Dollars
2006-10-01	126
2008-07-01	95
2009-04-01	65
2011-10-01	-135
2013-10-01	1226
2015-07-01	-72
2015-10-01	4
2016-04-01	-50
2016-07-01	613
2017-01-01	2
2017-04-01	10
2018-04-01	463