Quarter	Millions of US Dollars
1999-10-01	142
2000-01-01	89
2000-04-01	0
2000-07-01	0
2000-10-01	0
2001-01-01	0
2001-04-01	0
2001-07-01	0
2001-10-01	0
2002-01-01	0
2002-04-01	0
2002-07-01	0
2002-10-01	0
2003-01-01	0
2003-04-01	0
2003-07-01	0
2003-10-01	0
2004-01-01	0
2004-04-01	0
2004-07-01	0
2004-10-01	0
2005-01-01	0
2005-04-01	137
2005-07-01	137
2005-10-01	129
2006-01-01	140
2006-04-01	131
2006-07-01	127
2006-10-01	132
2007-01-01	219
2007-04-01	221
2007-07-01	296
2007-10-01	160
2008-01-01	134
2008-04-01	236
2008-07-01	151
2008-10-01	145
2009-01-01	5
2009-04-01	6
2009-07-01	13
2009-10-01	112
2010-01-01	12
2010-04-01	11
2010-07-01	14
2010-10-01	0
2011-01-01	40
2011-04-01	40
2011-07-01	38
2011-10-01	0
2012-01-01	0
2012-04-01	0
2012-07-01	0
2012-10-01	56
2013-01-01	55
2013-04-01	55
2013-07-01	58
2013-10-01	0
2014-01-01	0
2014-04-01	0
2014-07-01	0
2014-10-01	0
2015-01-01	0
2015-04-01	0
2015-07-01	85
2015-10-01	19
2016-01-01	113
2016-04-01	27
2016-07-01	23
2016-10-01	8
2017-01-01	32
2017-04-01	153
2017-07-01	159
2017-10-01	2
2018-01-01	166