Quarter	Millions of US Dollars
1994-01-01	0
1994-04-01	0
1994-07-01	0
1994-10-01	0
1995-01-01	0
1995-04-01	0
1995-07-01	0
1995-10-01	0
1996-01-01	0
1996-04-01	0
1996-07-01	0
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	10
1998-04-01	10
1998-07-01	20
1998-10-01	20
1999-01-01	20
1999-04-01	20
1999-07-01	20
1999-10-01	20
2000-01-01	20
2000-04-01	20
2000-07-01	20
2000-10-01	20
2001-01-01	20
2001-04-01	20
2001-07-01	20
2001-10-01	20
2002-01-01	20
2002-04-01	20
2002-07-01	29
2002-10-01	29
2003-01-01	20
2003-04-01	20
2003-07-01	10
2003-10-01	10
2004-01-01	20
2004-04-01	20
2004-07-01	20
2004-10-01	20
2005-01-01	20
2005-04-01	20
2005-07-01	10
2005-10-01	20
2006-01-01	10
2006-04-01	20
2006-07-01	29
2006-10-01	20
2007-01-01	29
2007-04-01	20
2007-07-01	20
2007-10-01	20
2008-01-01	1073
2008-04-01	2479
2008-07-01	1082
2008-10-01	10
2009-01-01	189
2009-04-01	107
2009-07-01	947
2009-10-01	483
2010-01-01	1059
2010-04-01	547
2010-07-01	649
2010-10-01	675
2011-01-01	953
2011-04-01	525
2011-07-01	436
2011-10-01	1032
2012-01-01	401
2012-04-01	0
2012-07-01	0
2012-10-01	132
2013-01-01	0
2013-04-01	392
2013-07-01	608
2013-10-01	414
2014-01-01	529
2014-04-01	314
2014-07-01	315
2014-10-01	304
2015-01-01	377
2015-04-01	392
2015-07-01	392
2015-10-01	292
2016-01-01	398
2016-04-01	389
2016-07-01	391
2016-10-01	369
2017-01-01	96
2017-04-01	103
2017-07-01	106
2017-10-01	108
2018-01-01	0
2018-04-01	0