Quarter	US dollars
2007-06-30	34
2007-09-30	22
2007-12-31	20
2008-03-31	8
2008-06-30	4
2008-09-30	9
2008-12-31	9
2009-03-31	24
2009-06-30	25
2009-09-30	26
2009-12-31	19
2010-03-31	26
2010-06-30	28
2010-09-30	33
2010-12-31	33
2011-03-31	26
2011-06-30	26
2011-09-30	22
2011-12-31	20
2012-03-31	32
2012-06-30	49
2012-09-30	65
2012-12-31	76
2013-03-31	97
2013-06-30	56
2013-09-30	71
2013-12-31	76
2014-03-31	48
2014-06-30	50
2014-09-30	19
2014-12-31	-2
2015-03-31	40
2015-06-30	36
2015-09-30	11
2015-12-31	36
2016-03-31	55
2016-06-30	68
2016-09-30	91
2016-12-31	90
2017-03-31	125
2017-06-30	118
2017-09-30	149
2017-12-31	111
2018-03-31	51
2018-06-30	34
2018-09-30	26
2018-12-31	4
2019-03-31	1
2019-06-30	5
2019-09-30	5
2019-12-31	26
2020-03-31	26
2020-06-30	19
2020-09-30	16
2020-12-31	19
2021-03-31	12
2021-06-30	10
2021-09-30	8
2021-12-31	8
2022-03-31	24
2022-06-30	6
2022-09-30	7
2022-12-31	5
2023-03-31	13
2023-06-30	23
2023-09-30	-15