Quarter	US dollars
1999-03-31	66
1999-06-30	64
1999-09-30	85
1999-12-31	105
2000-03-31	72
2000-06-30	91
2000-09-30	131
2000-12-31	147
2001-03-31	158
2001-06-30	123
2001-09-30	134
2001-12-31	172
2002-03-31	189
2002-06-30	186
2002-09-30	54
2002-12-31	47
2003-03-31	45
2003-06-30	43
2003-09-30	76
2003-12-31	43
2004-03-31	55
2004-06-30	45
2004-09-30	47
2004-12-31	39
2005-03-31	43
2005-06-30	4
2005-09-30	5
2005-12-31	9
2006-03-31	2
2006-06-30	10
2006-09-30	18
2006-12-31	15
2007-03-31	21
2007-06-30	21
2007-09-30	32
2007-12-31	39
2008-03-31	39
2008-06-30	46
2008-09-30	52
2008-12-31	21
2009-03-31	33
2009-06-30	30
2009-09-30	40
2009-12-31	31
2010-03-31	40
2010-06-30	25
2010-09-30	34
2010-12-31	31
2011-03-31	35
2011-06-30	25
2011-09-30	25
2011-12-31	75
2012-03-31	240
2012-06-30	175
2012-09-30	331
2012-12-31	240
2013-03-31	300
2013-06-30	375
2013-09-30	703
2013-12-31	436
2014-03-31	1067
2014-06-30	1251
2014-09-30	616
2014-12-31	1604
2015-03-31	543
2015-06-30	399
2015-09-30	1
2015-12-31	1
2016-03-31	0
2016-06-30	0
2016-09-30	3
2016-12-31	150
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	250
2019-03-31	250
2019-06-30	250
2019-09-30	400
2019-12-31	450
2020-03-31	698
2020-06-30	1050
2020-09-30	950
2020-12-31	950
2021-03-31	650
2021-06-30	600
2021-09-30	599
2021-12-31	896
2022-03-31	932
2022-06-30	559
2022-09-30	963
2022-12-31	829
2023-03-31	1129
2023-06-30	1149
2023-09-30	1282