Quarter	US dollars
1999-03-31	67
1999-06-30	65
1999-09-30	86
1999-12-31	118
2000-03-31	80
2000-06-30	95
2000-09-30	135
2000-12-31	152
2001-03-31	164
2001-06-30	125
2001-09-30	139
2001-12-31	175
2002-03-31	193
2002-06-30	189
2002-09-30	56
2002-12-31	49
2003-03-31	48
2003-06-30	44
2003-09-30	78
2003-12-31	45
2004-03-31	60
2004-06-30	50
2004-09-30	51
2004-12-31	44
2005-03-31	47
2005-06-30	6
2005-09-30	6
2005-12-31	11
2006-03-31	3
2006-06-30	11
2006-09-30	19
2006-12-31	17
2007-03-31	21
2007-06-30	22
2007-09-30	34
2007-12-31	39
2008-03-31	40
2008-06-30	49
2008-09-30	54
2008-12-31	26
2009-03-31	36
2009-06-30	34
2009-09-30	44
2009-12-31	33
2010-03-31	42
2010-06-30	27
2010-09-30	36
2010-12-31	33
2011-03-31	36
2011-06-30	26
2011-09-30	84
2011-12-31	94
2012-03-31	307
2012-06-30	181
2012-09-30	353
2012-12-31	244
2013-03-31	309
2013-06-30	380
2013-09-30	706
2013-12-31	439
2014-03-31	1070
2014-06-30	1253
2014-09-30	619
2014-12-31	1606
2015-03-31	544
2015-06-30	401
2015-09-30	2
2015-12-31	3
2016-03-31	2
2016-06-30	2
2016-09-30	4
2016-12-31	151
2017-03-31	1
2017-06-30	1
2017-09-30	1
2017-12-31	1
2018-03-31	0
2018-06-30	1
2018-09-30	1
2018-12-31	251
2019-03-31	251
2019-06-30	251
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	600
2021-12-31	897
2022-03-31	932
2022-06-30	559
2022-09-30	963
2022-12-31	830
2023-03-31	1133
2023-06-30	1150
2023-09-30	1282