Quarter	US dollars
2004-12-31	25
2005-03-31	21
2005-06-30	22
2005-09-30	25
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	4
2006-12-31	2
2007-03-31	2
2007-06-30	12
2007-09-30	12
2007-12-31	28
2008-03-31	10
2008-06-30	12
2008-09-30	11
2008-12-31	12
2009-03-31	11
2009-06-30	16
2009-09-30	18
2009-12-31	19
2010-03-31	18
2010-06-30	19
2010-09-30	24
2010-12-31	27
2011-03-31	38
2011-06-30	31
2011-09-30	26
2011-12-31	31
2012-03-31	43
2012-06-30	49
2012-09-30	32
2012-12-31	47
2013-03-31	46
2013-06-30	85
2013-09-30	89
2013-12-31	68
2014-03-31	57
2014-06-30	50
2014-09-30	42
2014-12-31	31
2015-03-31	34
2015-06-30	50
2015-09-30	0
2015-12-31	0
2016-03-31	-1
2016-06-30	20
2016-09-30	18
2016-12-31	18
2017-03-31	9
2017-06-30	8
2017-09-30	13
2017-12-31	12
2018-03-31	11
2018-06-30	11
2018-09-30	90
2018-12-31	103
2019-03-31	176
2019-06-30	151
2019-09-30	172
2019-12-31	188
2020-03-31	162
2020-06-30	54
2020-09-30	58
2020-12-31	56
2021-03-31	62
2021-06-30	84
2021-09-30	84
2021-12-31	84
2022-03-31	58
2022-06-30	58
2022-09-30	60
2022-12-31	37
2023-03-31	38
2023-06-30	43
2023-09-30	44