Quarter	US dollars
2004-12-31	15
2005-03-31	123
2005-06-30	23
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	-2
2006-09-30	0
2006-12-31	4
2007-03-31	2
2007-06-30	2
2007-09-30	2
2007-12-31	0
2008-03-31	2
2008-06-30	4
2008-09-30	16
2008-12-31	20
2009-03-31	17
2009-06-30	18
2009-09-30	14
2009-12-31	2
2010-03-31	3
2010-06-30	271
2010-09-30	3
2010-12-31	5
2011-03-31	6
2011-06-30	18
2011-09-30	156
2011-12-31	14
2012-03-31	13
2012-06-30	89
2012-09-30	81
2012-12-31	94
2013-03-31	65
2013-06-30	6
2013-09-30	40
2013-12-31	233
2014-03-31	412
2014-06-30	412
2014-09-30	133
2014-12-31	120
2015-03-31	166
2015-06-30	96
2015-09-30	73
2015-12-31	71
2016-03-31	139
2016-06-30	130
2016-09-30	261
2016-12-31	103
2017-03-31	244
2017-06-30	75
2017-09-30	20
2017-12-31	20
2018-03-31	10
2018-06-30	1
2018-09-30	1
2018-12-31	1
2019-03-31	1
2019-06-30	34
2019-09-30	1