Quarter	US dollars
2007-06-30	8
2007-09-30	8
2007-12-31	8
2008-03-31	0
2008-06-30	0
2008-09-30	0
2008-12-31	0
2009-03-31	0
2009-06-30	0
2009-09-30	0
2009-12-31	0
2010-03-31	0
2010-06-30	0
2010-09-30	0
2010-12-31	0
2011-03-31	0
2011-06-30	0
2011-09-30	0
2011-12-31	0
2012-03-31	21
2012-06-30	9
2012-09-30	10
2012-12-31	15
2013-03-31	46
2013-06-30	42
2013-09-30	50
2013-12-31	64
2014-03-31	52
2014-06-30	39
2014-09-30	39
2014-12-31	31
2015-03-31	31
2015-06-30	31
2015-09-30	23
2015-12-31	22
2016-03-31	22
2016-06-30	23
2016-09-30	22
2016-12-31	22
2017-03-31	23
2017-06-30	22
2017-09-30	32
2017-12-31	32
2018-03-31	27
2018-06-30	11
2018-09-30	0
2018-12-31	10
2019-03-31	10
2019-06-30	10
2019-09-30	30
2019-12-31	30
2020-03-31	25
2020-06-30	47
2020-09-30	47
2020-12-31	25
2021-03-31	25
2021-06-30	25
2021-09-30	26
2021-12-31	26
2022-03-31	29
2022-06-30	29
2022-09-30	29
2022-12-31	30
2023-03-31	30
2023-06-30	30
2023-09-30	30