Quarter	Millions of US Dollars
1996-04-01	8
1996-07-01	8
1996-10-01	8
1997-01-01	7
1997-04-01	14
1997-07-01	14
1997-10-01	120
1998-01-01	109
1998-04-01	120
1998-07-01	121
1998-10-01	139
1999-01-01	136
1999-04-01	58
1999-07-01	71
1999-10-01	48
2000-01-01	39
2000-04-01	44
2000-07-01	31
2000-10-01	33
2001-01-01	69
2001-04-01	85
2001-07-01	90
2001-10-01	89
2002-01-01	44
2002-04-01	7
2002-07-01	7
2002-10-01	6
2003-01-01	6
2003-04-01	4
2003-07-01	16
2003-10-01	15
2004-01-01	15
2004-04-01	12
2004-07-01	0
2004-10-01	197
2005-01-01	259
2005-04-01	242
2005-07-01	241
2005-10-01	65
2006-01-01	0
2006-04-01	127
2006-07-01	127
2006-10-01	132
2007-01-01	133
2007-04-01	0
2007-07-01	0
2007-10-01	0
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	0
2011-07-01	0
2011-10-01	0
2012-01-01	0
2012-04-01	0
2012-07-01	0
2012-10-01	0
2013-01-01	0
2013-04-01	38
2013-07-01	39
2013-10-01	40
2014-01-01	40
2014-04-01	0
2014-07-01	0
2014-10-01	8
2015-01-01	7
2015-04-01	7
2015-07-01	7
2015-10-01	0
2016-01-01	0
2016-04-01	0
2016-07-01	0
2016-10-01	0
2017-01-01	0
2017-04-01	0
2017-07-01	266
2017-10-01	859
2018-01-01	885
2018-04-01	839