Quarter	Millions of US Dollars
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	400
1998-01-01	0
1998-04-01	100
1998-07-01	101
1998-10-01	220
1999-01-01	220
1999-04-01	501
1999-07-01	500
1999-10-01	281
2000-01-01	281
2000-04-01	442
2000-07-01	405
2000-10-01	1430
2001-01-01	1408
2001-04-01	1300
2001-07-01	1300
2001-10-01	400
2002-01-01	410
2002-04-01	1746
2002-07-01	1742
2002-10-01	1666
2003-01-01	2786
2003-04-01	1169
2003-07-01	1192
2003-10-01	1734
2004-01-01	1209
2004-04-01	1202
2004-07-01	4464
2004-10-01	4107
2005-01-01	3520
2005-04-01	4004
2005-07-01	1049
2005-10-01	1039
2006-01-01	1153
2006-04-01	3069
2006-07-01	3170
2006-10-01	3170
2007-01-01	3170
2007-04-01	770
2007-07-01	770
2007-10-01	770
2008-01-01	1075
2008-04-01	1075
2008-07-01	1380
2008-10-01	1380
2009-01-01	1380
2009-04-01	1380
2009-07-01	1198
2009-10-01	1198
2010-01-01	1117
2010-04-01	1117
2010-07-01	1219
2010-10-01	1718
2011-01-01	1750
2011-04-01	1759
2011-07-01	1724
2011-10-01	1219
2012-01-01	1219
2012-04-01	1219
2012-07-01	1219
2012-10-01	1219
2013-01-01	13678
2013-04-01	13678
2013-07-01	13678
2013-10-01	13678
2014-01-01	1219
2014-04-01	3219
2014-07-01	3219
2014-10-01	3219
2015-01-01	3219
2015-04-01	1219
2015-07-01	1219
2015-10-01	1662
2016-01-01	1682
2016-04-01	3670
2016-07-01	3673
2016-10-01	3219
2017-01-01	4814
2017-04-01	2739
2017-07-01	6242
2017-10-01	6240
2018-01-01	6388
2018-04-01	6388