Quarter	Millions of US Dollars
2000-04-01	43
2000-07-01	225
2000-10-01	-35
2001-01-01	157
2001-04-01	71
2001-07-01	27
2001-10-01	186
2002-01-01	8
2002-04-01	133
2002-07-01	31
2002-10-01	338
2003-01-01	237
2003-04-01	106
2003-07-01	-63
2003-10-01	-65
2004-01-01	252
2004-04-01	260
2004-07-01	321
2004-10-01	449
2005-01-01	1006
2005-04-01	-9
2005-07-01	363
2005-10-01	199
2006-01-01	260
2006-04-01	-37
2006-07-01	458
2006-10-01	386
2007-01-01	528
2007-04-01	-144
2007-07-01	-177
2007-10-01	408
2008-01-01	-71
2008-04-01	-198
2008-07-01	-285
2008-10-01	970
2009-01-01	99
2009-04-01	14
2009-07-01	282
2009-10-01	404
2010-01-01	877
2010-04-01	119
2010-07-01	960
2010-10-01	369
2011-01-01	432
2011-04-01	-402
2011-07-01	384
2011-10-01	324
2012-01-01	1024
2012-04-01	-562
2012-07-01	462
2012-10-01	252
2013-01-01	584
2013-04-01	-74
2013-07-01	462
2013-10-01	379
2014-01-01	772
2014-04-01	88
2014-07-01	-51
2014-10-01	692
2015-01-01	129
2015-04-01	-10
2015-07-01	128
2015-10-01	-2
2016-01-01	564
2016-04-01	-221
2016-07-01	568
2016-10-01	102
2017-01-01	355
2017-04-01	156
2017-07-01	506
2017-10-01	111
2018-01-01	249