Quarter	Millions of US Dollars
1983-10-01	43
1993-07-01	500
1993-10-01	371
1994-01-01	200
1994-04-01	735
1994-07-01	100
1994-10-01	760
1995-07-01	1550
1995-10-01	350
1996-01-01	264
1996-04-01	204
1996-07-01	45
1996-10-01	2005
1997-01-01	109
1997-04-01	896
1997-07-01	500
1997-10-01	333
1998-01-01	-50
1998-07-01	-100
1999-01-01	452
1999-04-01	-108
1999-07-01	619
1999-10-01	-146
2000-01-01	5
2000-04-01	142
2000-10-01	58
2001-04-01	435
2001-07-01	8
2001-10-01	-150
2002-01-01	120
2002-07-01	-450
2002-10-01	-171
2003-01-01	-93
2003-04-01	-57
2003-07-01	-853
2003-10-01	-529
2004-01-01	-317
2004-04-01	-687
2004-07-01	350
2004-10-01	-270
2005-01-01	-225
2005-07-01	-575
2006-01-01	-114
2006-04-01	-122
2006-10-01	-800
2007-01-01	-92
2007-04-01	-750
2007-10-01	163
2009-01-01	-181
2009-07-01	-400
2010-04-01	-14
2011-04-01	-600
2012-10-01	-265
2013-01-01	627
2014-07-01	-700
2015-07-01	-525
2016-10-01	828
2018-01-01	-400