Quarter	US dollars
2007-06-30	22
2007-09-30	9
2007-12-31	10
2008-03-31	10
2008-06-30	9
2008-09-30	12
2008-12-31	10
2009-03-31	11
2009-06-30	7
2009-09-30	7
2009-12-31	10
2010-03-31	10
2010-06-30	42
2010-09-30	55
2010-12-31	34
2011-03-31	16
2011-06-30	49
2011-09-30	29
2011-12-31	22
2012-03-31	39
2012-06-30	58
2012-09-30	47
2012-12-31	33
2013-03-31	34
2013-06-30	33
2013-09-30	30
2013-12-31	28
2014-03-31	24
2014-06-30	24
2014-09-30	23
2014-12-31	25
2015-03-31	21
2015-06-30	36
2015-09-30	21
2015-12-31	46
2016-03-31	34
2016-06-30	21
2016-09-30	30
2016-12-31	43
2017-03-31	35
2017-06-30	38
2017-09-30	33
2017-12-31	63
2018-03-31	59
2018-06-30	30
2018-09-30	22
2018-12-31	24
2019-03-31	25
2019-06-30	23
2019-09-30	20
2019-12-31	19
2020-03-31	25
2020-06-30	27
2020-09-30	23
2020-12-31	28
2021-03-31	32
2021-06-30	18
2021-09-30	20
2021-12-31	19
2022-03-31	25
2022-06-30	16
2022-09-30	15
2022-12-31	16
2023-03-31	14
2023-06-30	13
2023-09-30	13