Quarter	US dollars
1999-03-31	86
1999-06-30	93
1999-09-30	100
1999-12-31	69
2000-03-31	80
2000-06-30	79
2000-09-30	63
2000-12-31	43
2001-03-31	70
2001-06-30	68
2001-09-30	51
2001-12-31	36
2002-03-31	32
2002-06-30	39
2002-09-30	43
2002-12-31	27
2003-03-31	33
2003-06-30	23
2003-09-30	16
2003-12-31	15
2004-03-31	18
2004-06-30	12
2004-09-30	8
2004-12-31	11
2005-03-31	52
2005-06-30	48
2005-09-30	22
2005-12-31	46
2006-03-31	23
2006-06-30	46
2006-09-30	68
2006-12-31	26
2007-03-31	48
2007-06-30	17
2007-09-30	10
2007-12-31	21
2008-03-31	29
2008-06-30	38
2008-09-30	37
2008-12-31	22
2009-03-31	25
2009-06-30	26
2009-09-30	32
2009-12-31	42
2010-03-31	43
2010-06-30	32
2010-09-30	40
2010-12-31	58
2011-03-31	42
2011-06-30	50
2011-09-30	49
2011-12-31	28
2012-03-31	121
2012-06-30	168
2012-09-30	169
2012-12-31	122
2013-03-31	26
2013-06-30	27
2013-09-30	28
2013-12-31	31
2014-03-31	30
2014-06-30	33
2014-09-30	31
2014-12-31	27
2015-03-31	17
2015-06-30	12
2015-09-30	6
2015-12-31	0
2016-03-31	0
2016-06-30	0
2016-09-30	0
2016-12-31	0
2017-03-31	0
2017-06-30	0
2017-09-30	0
2017-12-31	0
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	0
2019-06-30	0
2019-09-30	0
2019-12-31	0
2020-03-31	0
2020-06-30	0
2020-09-30	0
2020-12-31	0
2021-03-31	0
2021-06-30	0
2021-09-30	0
2021-12-31	0
2022-03-31	0
2022-06-30	0
2022-09-30	0
2022-12-31	-21
2023-03-31	0
2023-06-30	0
2023-09-30	0