Quarter	US dollars
1999-09-30	23
1999-12-31	13
2000-03-31	26
2000-06-30	14
2000-09-30	10
2000-12-31	30
2001-03-31	1
2001-06-30	1
2001-09-30	1
2001-12-31	9
2002-03-31	6
2002-06-30	8
2002-09-30	9
2002-12-31	26
2003-03-31	27
2003-06-30	33
2003-09-30	33
2003-12-31	41
2004-03-31	42
2004-06-30	22
2004-09-30	33
2004-12-31	38
2005-03-31	26
2005-06-30	34
2005-09-30	32
2005-12-31	24
2006-03-31	17
2006-06-30	22
2006-09-30	15
2006-12-31	6
2007-03-31	12
2007-06-30	14
2007-09-30	43
2007-12-31	58
2008-03-31	189
2008-06-30	113
2008-09-30	143
2008-12-31	121
2009-03-31	93
2009-06-30	91
2009-09-30	94
2009-12-31	73
2010-03-31	123
2010-06-30	114
2010-09-30	107
2010-12-31	38
2011-03-31	35
2011-06-30	42
2011-09-30	48
2011-12-31	31
2012-03-31	42
2012-06-30	55
2012-09-30	55
2012-12-31	39
2013-03-31	52
2013-06-30	46
2013-09-30	26
2013-12-31	31
2014-03-31	82
2014-06-30	106
2014-09-30	146
2014-12-31	211
2015-03-31	260
2015-06-30	195
2015-09-30	192
2015-12-31	141
2016-03-31	170
2016-06-30	197
2016-09-30	183
2016-12-31	160
2017-03-31	128
2017-06-30	132
2017-09-30	127
2017-12-31	131
2018-03-31	98
2018-06-30	106
2018-09-30	95
2018-12-31	107
2019-03-31	121
2019-06-30	150
2019-09-30	186
2019-12-31	107
2020-03-31	220
2020-06-30	185
2020-09-30	65
2020-12-31	66
2021-03-31	39
2021-06-30	43
2021-09-30	54
2021-12-31	44
2022-03-31	25
2022-06-30	35
2022-09-30	36
2022-12-31	25
2023-03-31	16
2023-06-30	16
2023-09-30	16