Quarter	US dollars
2004-12-31	6
2005-03-31	6
2005-06-30	7
2005-09-30	11
2005-12-31	31
2006-03-31	31
2006-06-30	67
2006-09-30	52
2006-12-31	55
2007-03-31	55
2007-06-30	54
2007-09-30	55
2007-12-31	56
2008-03-31	60
2008-06-30	58
2008-09-30	50
2008-12-31	62
2009-03-31	42
2009-06-30	43
2009-09-30	35
2009-12-31	42
2010-03-31	53
2010-06-30	57
2010-09-30	65
2010-12-31	66
2011-03-31	67
2011-06-30	79
2011-09-30	76
2011-12-31	73
2012-03-31	70
2012-06-30	69
2012-09-30	40
2012-12-31	37
2013-03-31	33
2013-06-30	35
2013-09-30	37
2013-12-31	35
2014-03-31	30
2014-06-30	31
2014-09-30	28
2014-12-31	27
2015-03-31	25
2015-06-30	27
2015-09-30	27
2015-12-31	19
2016-03-31	3
2016-06-30	21
2016-09-30	12
2016-12-31	9
2017-03-31	11
2017-06-30	-5
2017-09-30	-7
2017-12-31	-1
2018-03-31	-7
2018-06-30	13
2018-09-30	-21
2018-12-31	18
2019-03-31	-10
2019-06-30	-17
2019-09-30	4
2019-12-31	9
2020-03-31	4
2020-06-30	0
2020-09-30	-12
2020-12-31	-14
2021-03-31	0
2021-06-30	6
2021-09-30	3
2021-12-31	-12
2022-03-31	-17
2022-06-30	-14
2022-09-30	-5
2022-12-31	-12
2023-03-31	-2
2023-06-30	-12
2023-09-30	-7