Quarter	US dollars
2004-12-31	2
2005-03-31	2
2005-06-30	2
2005-09-30	4
2005-12-31	3
2006-03-31	3
2006-06-30	4
2006-09-30	6
2006-12-31	6
2007-03-31	6
2007-06-30	8
2007-09-30	10
2007-12-31	14
2008-03-31	12
2008-06-30	12
2008-09-30	14
2008-12-31	12
2009-03-31	14
2009-06-30	12
2009-09-30	21
2009-12-31	13
2010-03-31	12
2010-06-30	13
2010-09-30	19
2010-12-31	30
2011-03-31	30
2011-06-30	26
2011-09-30	36
2011-12-31	45
2012-03-31	42
2012-06-30	38
2012-09-30	44
2012-12-31	47
2013-03-31	46
2013-06-30	46
2013-09-30	47
2013-12-31	56
2014-03-31	55
2014-06-30	62
2014-09-30	60
2014-12-31	30
2015-03-31	30
2015-06-30	30
2015-09-30	32
2015-12-31	33
2016-03-31	23
2016-06-30	23
2016-09-30	39
2016-12-31	21
2017-03-31	16
2017-06-30	21
2017-09-30	25
2017-12-31	26
2018-03-31	67
2018-06-30	49
2018-09-30	52
2018-12-31	47
2019-03-31	55
2019-06-30	57
2019-09-30	58
2019-12-31	78
2020-03-31	60
2020-06-30	37
2020-09-30	44
2020-12-31	42
2021-03-31	43
2021-06-30	53
2021-09-30	59
2021-12-31	71
2022-03-31	20
2022-06-30	24
2022-09-30	54
2022-12-31	51
2023-03-31	52
2023-06-30	42
2023-09-30	52