Quarter	US dollars
2007-06-30	0
2007-09-30	0
2007-12-31	0
2008-03-31	2
2008-06-30	0
2008-09-30	4
2008-12-31	7
2009-03-31	11
2009-06-30	8
2009-09-30	26
2009-12-31	19
2010-03-31	12
2010-06-30	12
2010-09-30	24
2010-12-31	25
2011-03-31	0
2011-06-30	8
2011-09-30	19
2011-12-31	25
2012-03-31	22
2012-06-30	24
2012-09-30	31
2012-12-31	26
2013-03-31	23
2013-06-30	6
2013-09-30	28
2013-12-31	48
2014-03-31	30
2014-06-30	12
2014-09-30	10
2014-12-31	9
2015-03-31	12
2015-06-30	2
2015-09-30	6
2015-12-31	4
2016-03-31	1
2016-06-30	3
2016-09-30	0
2016-12-31	0
2017-03-31	1
2017-06-30	0
2017-09-30	0
2017-12-31	1
2018-03-31	13
2018-06-30	1
2018-09-30	3
2018-12-31	3
2019-03-31	0
2019-06-30	1
2019-09-30	0
2019-12-31	5
2020-03-31	12
2020-06-30	5
2020-09-30	9
2020-12-31	15
2021-03-31	10
2021-06-30	6
2021-09-30	5
2021-12-31	5
2022-03-31	12
2022-06-30	3
2022-09-30	6
2022-12-31	3
2023-03-31	10
2023-06-30	25
2023-09-30	6