Quarter	US dollars
1999-03-31	63
1999-06-30	55
1999-09-30	54
1999-12-31	52
2000-03-31	48
2000-06-30	47
2000-09-30	35
2000-12-31	33
2001-03-31	49
2001-06-30	75
2001-09-30	287
2001-12-31	286
2002-03-31	100
2002-06-30	118
2002-09-30	95
2002-12-31	100
2003-03-31	103
2003-06-30	112
2003-09-30	108
2003-12-31	109
2004-03-31	111
2004-06-30	104
2004-09-30	102
2004-12-31	126
2005-03-31	124
2005-06-30	116
2005-09-30	91
2005-12-31	26
2006-03-31	23
2006-06-30	24
2006-09-30	27
2006-12-31	32
2007-03-31	59
2007-06-30	25
2007-09-30	29
2007-12-31	26
2008-03-31	28
2008-06-30	43
2008-09-30	67
2008-12-31	71
2009-03-31	59
2009-06-30	42
2009-09-30	38
2009-12-31	34
2010-03-31	31
2010-06-30	29
2010-09-30	30
2010-12-31	17
2011-03-31	25
2011-06-30	32
2011-09-30	15
2011-12-31	14
2012-03-31	49
2012-06-30	14
2012-09-30	14
2012-12-31	11
2013-03-31	14
2013-06-30	16
2013-09-30	17
2013-12-31	26
2014-03-31	61
2014-06-30	29
2014-09-30	16
2014-12-31	10
2015-03-31	8
2015-06-30	9
2015-09-30	9
2015-12-31	4
2016-03-31	7
2016-06-30	19
2016-09-30	10
2016-12-31	13
2017-03-31	5
2017-06-30	28
2017-09-30	7
2017-12-31	51
2018-03-31	57
2018-06-30	26
2018-09-30	16
2018-12-31	22
2019-03-31	51
2019-06-30	56
2019-09-30	51
2019-12-31	41
2020-03-31	48
2020-06-30	125
2020-09-30	35
2020-12-31	28
2021-03-31	23
2021-06-30	21
2021-09-30	21
2021-12-31	43
2022-03-31	25
2022-06-30	45
2022-09-30	21
2022-12-31	9
2023-03-31	16
2023-06-30	54
2023-09-30	12