Quarter	US dollars
2004-12-31	40
2005-03-31	40
2005-06-30	36
2005-09-30	28
2005-12-31	31
2006-03-31	12
2006-06-30	22
2006-09-30	4
2006-12-31	18
2007-03-31	14
2007-06-30	10
2007-09-30	12
2007-12-31	2
2008-03-31	2
2008-06-30	14
2008-09-30	12
2008-12-31	10
2009-03-31	10
2009-06-30	12
2009-09-30	10
2009-12-31	10
2010-03-31	8
2010-06-30	10
2010-09-30	11
2010-12-31	9
2011-03-31	10
2011-06-30	10
2011-09-30	12
2011-12-31	15
2012-03-31	16
2012-06-30	16
2012-09-30	15
2012-12-31	18
2013-03-31	18
2013-06-30	20
2013-09-30	19
2013-12-31	20
2014-03-31	15
2014-06-30	26
2014-09-30	24
2014-12-31	20
2015-03-31	21
2015-06-30	6
2015-09-30	12
2015-12-31	13
2016-03-31	-1
2016-06-30	0
2016-09-30	17
2016-12-31	9
2017-03-31	8
2017-06-30	18
2017-09-30	11
2017-12-31	32
2018-03-31	38
2018-06-30	48
2018-09-30	55
2018-12-31	64
2019-03-31	77
2019-06-30	87
2019-09-30	73
2019-12-31	102
2020-03-31	172
2020-06-30	184
2020-09-30	187
2020-12-31	136
2021-03-31	79
2021-06-30	54
2021-09-30	47
2021-12-31	47
2022-03-31	47
2022-06-30	47
2022-09-30	43
2022-12-31	40
2023-03-31	43
2023-06-30	45
2023-09-30	42