Quarter	US dollars
1999-03-31	335
1999-06-30	243
1999-09-30	245
1999-12-31	236
2000-03-31	189
2000-06-30	192
2000-09-30	151
2000-12-31	164
2001-03-31	135
2001-06-30	116
2001-09-30	69
2001-12-31	51
2002-03-31	50
2002-06-30	34
2002-09-30	45
2002-12-31	31
2003-03-31	26
2003-06-30	38
2003-09-30	31
2003-12-31	26
2004-03-31	26
2004-06-30	28
2004-09-30	28
2004-12-31	32
2005-03-31	38
2005-06-30	22
2005-09-30	25
2005-12-31	31
2006-03-31	11
2006-06-30	12
2006-09-30	-28
2006-12-31	16
2007-03-31	14
2007-06-30	8
2007-09-30	7
2007-12-31	13
2008-03-31	9
2008-06-30	24
2008-09-30	7
2008-12-31	5
2009-03-31	5
2009-06-30	1
2009-09-30	4
2009-12-31	16
2010-03-31	94
2010-06-30	16
2010-09-30	100
2010-12-31	68
2011-03-31	70
2011-06-30	31
2011-09-30	169
2011-12-31	97
2012-03-31	69
2012-06-30	122
2012-09-30	6
2012-12-31	25
2013-03-31	15
2013-06-30	174
2013-09-30	180
2013-12-31	186
2014-03-31	169
2014-06-30	174
2014-09-30	154
2014-12-31	18
2015-03-31	21
2015-06-30	9
2015-09-30	8
2015-12-31	10
2016-03-31	6
2016-06-30	11
2016-09-30	7
2016-12-31	10
2017-03-31	5
2017-06-30	23
2017-09-30	1
2017-12-31	25
2018-03-31	5
2018-06-30	2
2018-09-30	8
2018-12-31	10
2019-03-31	26
2019-06-30	2
2019-09-30	79
2019-12-31	29
2020-03-31	89
2020-06-30	117
2020-09-30	94
2020-12-31	104
2021-03-31	115
2021-06-30	99
2021-09-30	57
2021-12-31	57
2022-03-31	58
2022-06-30	81
2022-09-30	22
2022-12-31	75
2023-03-31	59
2023-06-30	22
2023-09-30	102