Quarter	Millions of US Dollars
1995-10-01	0
1996-01-01	0
1996-04-01	0
1996-07-01	0
1996-10-01	110
1997-01-01	110
1997-04-01	110
1997-07-01	110
1997-10-01	0
1998-01-01	0
1998-04-01	0
1998-07-01	0
1998-10-01	0
1999-01-01	0
1999-04-01	0
1999-07-01	0
1999-10-01	75
2000-01-01	0
2000-04-01	0
2000-07-01	0
2000-10-01	0
2001-01-01	0
2001-04-01	0
2001-07-01	200
2001-10-01	200
2002-01-01	200
2002-04-01	449
2002-07-01	286
2002-10-01	304
2003-01-01	588
2003-04-01	331
2003-07-01	291
2003-10-01	316
2004-01-01	1131
2004-04-01	395
2004-07-01	403
2004-10-01	482
2005-01-01	38
2005-04-01	35
2005-07-01	35
2005-10-01	87
2006-01-01	0
2006-04-01	0
2006-07-01	0
2006-10-01	0
2007-01-01	266
2007-04-01	270
2007-07-01	284
2007-10-01	294
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	0
2010-07-01	0
2010-10-01	0
2011-01-01	0
2011-04-01	1445
2011-07-01	1350
2011-10-01	1294
2012-01-01	2671
2012-04-01	1259
2012-07-01	1293
2012-10-01	1319
2013-01-01	0
2013-04-01	654
2013-07-01	675
2013-10-01	690
2014-01-01	2189
2014-04-01	1500
2014-07-01	1500
2014-10-01	1672
2015-01-01	1229
2015-04-01	1278
2015-07-01	1279
2015-10-01	1089
2016-01-01	0
2016-04-01	0
2016-07-01	750
2016-10-01	750
2017-01-01	2247
2017-04-01	2530
2017-07-01	1833
2017-10-01	1858
2018-01-01	183
2018-04-01	0