Quarter	US dollars
2004-12-31	31
2005-03-31	32
2005-06-30	27
2005-09-30	19
2005-12-31	41
2006-03-31	42
2006-06-30	35
2006-09-30	30
2006-12-31	31
2007-03-31	22
2007-06-30	30
2007-09-30	24
2007-12-31	28
2008-03-31	28
2008-06-30	50
2008-09-30	32
2008-12-31	56
2009-03-31	21
2009-06-30	5
2009-09-30	5
2009-12-31	15
2010-03-31	3
2010-06-30	7
2010-09-30	3
2010-12-31	6
2011-03-31	10
2011-06-30	3
2011-09-30	12
2011-12-31	9
2012-03-31	3
2012-06-30	13
2012-09-30	21
2012-12-31	19
2013-03-31	11
2013-06-30	12
2013-09-30	10
2013-12-31	12
2014-03-31	10
2014-06-30	12
2014-09-30	10
2014-12-31	8
2015-03-31	6
2015-06-30	5
2015-09-30	6
2015-12-31	10
2016-03-31	-17
2016-06-30	-19
2016-09-30	-18
2016-12-31	-17
2017-03-31	-18
2017-06-30	-9
2017-09-30	-12
2017-12-31	-7
2018-03-31	-8
2018-06-30	13
2018-09-30	14
2018-12-31	11
2019-03-31	14
2019-06-30	15
2019-09-30	12
2019-12-31	12
2020-03-31	12
2020-06-30	4
2020-09-30	4
2020-12-31	10
2021-03-31	10
2021-06-30	3
2021-09-30	3
2021-12-31	1
2022-03-31	4
2022-06-30	4
2022-09-30	17
2022-12-31	16
2023-03-31	12
2023-06-30	10
2023-09-30	20