Quarter	US dollars
2007-06-30	24
2007-09-30	14
2007-12-31	12
2008-03-31	6
2008-06-30	4
2008-09-30	2
2008-12-31	1
2009-03-31	1
2009-06-30	5
2009-09-30	0
2009-12-31	0
2010-03-31	3
2010-06-30	3
2010-09-30	6
2010-12-31	8
2011-03-31	6
2011-06-30	5
2011-09-30	3
2011-12-31	-6
2012-03-31	0
2012-06-30	16
2012-09-30	19
2012-12-31	24
2013-03-31	11
2013-06-30	15
2013-09-30	19
2013-12-31	15
2014-03-31	12
2014-06-30	14
2014-09-30	3
2014-12-31	-16
2015-03-31	25
2015-06-30	31
2015-09-30	2
2015-12-31	28
2016-03-31	49
2016-06-30	62
2016-09-30	87
2016-12-31	86
2017-03-31	120
2017-06-30	114
2017-09-30	145
2017-12-31	104
2018-03-31	35
2018-06-30	30
2018-09-30	23
2018-12-31	0
2019-03-31	0
2019-06-30	1
2019-09-30	1
2019-12-31	17
2020-03-31	11
2020-06-30	11
2020-09-30	4
2020-12-31	3
2021-03-31	1
2021-06-30	3
2021-09-30	1
2021-12-31	1
2022-03-31	12
2022-06-30	3
2022-09-30	1
2022-12-31	0
2023-03-31	2
2023-06-30	-4
2023-09-30	-22