Quarter	Millions of US Dollars
1992-01-01	2051
2002-04-01	0
2002-10-01	-601
2006-10-01	-1450
2007-01-01	175
2010-01-01	88
2010-07-01	0
2011-01-01	500
2012-01-01	-175
2012-07-01	452
2013-01-01	473
2013-04-01	300
2013-07-01	1300
2013-10-01	551
2014-04-01	1139
2014-07-01	700
2014-10-01	300
2015-01-01	-74
2015-04-01	1293
2015-07-01	43
2015-10-01	47
2016-01-01	2
2016-07-01	-30
2016-10-01	586
2017-01-01	-15
2017-04-01	2772
2017-07-01	-295
2017-10-01	4064
2018-01-01	1912
2018-04-01	891