Quarter	Millions of US Dollars
1995-10-01	150
2000-10-01	-150
2005-10-01	10
2006-04-01	16
2006-07-01	80
2006-10-01	48
2007-01-01	167
2007-04-01	63
2007-07-01	139
2007-10-01	274
2008-01-01	133
2008-04-01	-44
2008-07-01	-152
2008-10-01	0
2009-01-01	-94
2009-10-01	21
2010-01-01	-140
2010-04-01	-32
2010-07-01	24
2011-01-01	-123
2011-04-01	-18
2011-10-01	-15
2012-04-01	-29
2012-07-01	10
2012-10-01	-110
2013-01-01	0
2013-07-01	125
2014-01-01	-60
2014-07-01	-4
2014-10-01	838
2015-07-01	-19
2016-04-01	0
2016-07-01	500
2016-10-01	0
2017-01-01	124
2017-04-01	-91
2017-07-01	0
2017-10-01	-5