Quarter	Millions of US Dollars
1995-10-01	150
1997-07-01	1200
1997-10-01	2188
1998-01-01	-188
1999-04-01	179
1999-07-01	164
1999-10-01	-111
2000-01-01	18
2000-04-01	6
2000-07-01	-5
2000-10-01	-144
2001-01-01	6
2001-04-01	7
2001-07-01	-98
2002-01-01	78
2002-10-01	-100
2003-04-01	250
2003-07-01	50
2004-07-01	-600
2005-10-01	10
2006-04-01	16
2006-07-01	80
2006-10-01	-152
2007-01-01	67
2007-04-01	63
2007-07-01	-461
2007-10-01	-176
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	-282
2010-07-01	24
2011-01-01	-123
2011-04-01	-18
2011-10-01	-15
2012-04-01	-29
2012-07-01	410
2012-10-01	-1360
2013-01-01	0
2013-07-01	125
2014-01-01	-60
2014-07-01	-4
2014-10-01	1588
2015-07-01	-19
2015-10-01	-400
2016-04-01	0
2016-07-01	300
2016-10-01	1000
2017-01-01	1199
2017-04-01	-91
2017-07-01	585
2017-10-01	-105
2018-01-01	500