Quarter	US dollars
1999-03-31	-3
1999-06-30	13
1999-09-30	19
1999-12-31	144
2000-03-31	89
2000-06-30	110
2000-09-30	75
2000-12-31	36
2001-03-31	47
2001-06-30	35
2001-09-30	89
2001-12-31	56
2002-03-31	23
2002-06-30	50
2002-09-30	25
2002-12-31	25
2003-03-31	33
2003-06-30	32
2003-09-30	30
2003-12-31	33
2004-03-31	218
2004-06-30	42
2004-09-30	61
2004-12-31	75
2005-03-31	51
2005-06-30	46
2005-09-30	48
2005-12-31	46
2006-03-31	45
2006-06-30	20
2006-09-30	20
2006-12-31	19
2007-03-31	19
2007-06-30	18
2007-09-30	372
2007-12-31	230
2008-03-31	196
2008-06-30	69
2008-09-30	24
2008-12-31	36
2009-03-31	44
2009-06-30	77
2009-09-30	54
2009-12-31	43
2010-03-31	42
2010-06-30	27
2010-09-30	31
2010-12-31	29
2011-03-31	32
2011-06-30	26
2011-09-30	17
2011-12-31	39
2012-03-31	41
2012-06-30	42
2012-09-30	43
2012-12-31	56
2013-03-31	17
2013-06-30	40
2013-09-30	45
2013-12-31	64
2014-03-31	23
2014-06-30	54
2014-09-30	180
2014-12-31	233
2015-03-31	30
2015-06-30	100
2015-09-30	84
2015-12-31	78
2016-03-31	96
2016-06-30	89
2016-09-30	96
2016-12-31	94
2017-03-31	100
2017-06-30	133
2017-09-30	130
2017-12-31	132
2018-03-31	83
2018-06-30	129
2018-09-30	77
2018-12-31	132
2019-03-31	78
2019-06-30	147
2019-09-30	71
2019-12-31	131
2020-03-31	39
2020-06-30	104
2020-09-30	45
2020-12-31	121
2021-03-31	45
2021-06-30	115
2021-09-30	43
2021-12-31	115
2022-03-31	41
2022-06-30	39
2022-09-30	40
2022-12-31	46
2023-03-31	48
2023-06-30	50
2023-09-30	51