Quarter	US dollars
2004-12-31	4
2005-03-31	6
2005-06-30	4
2005-09-30	5
2005-12-31	2
2006-03-31	2
2006-06-30	4
2006-09-30	9
2006-12-31	8
2007-03-31	45
2007-06-30	46
2007-09-30	47
2007-12-31	14
2008-03-31	12
2008-06-30	10
2008-09-30	18
2008-12-31	13
2009-03-31	23
2009-06-30	21
2009-09-30	21
2009-12-31	21
2010-03-31	30
2010-06-30	24
2010-09-30	25
2010-12-31	37
2011-03-31	31
2011-06-30	28
2011-09-30	30
2011-12-31	31
2012-03-31	237
2012-06-30	229
2012-09-30	207
2012-12-31	189
2013-03-31	369
2013-06-30	355
2013-09-30	283
2013-12-31	259
2014-03-31	257
2014-06-30	229
2014-09-30	191
2014-12-31	204
2015-03-31	178
2015-06-30	167
2015-09-30	147
2015-12-31	110
2016-03-31	96
2016-06-30	77
2016-09-30	77
2016-12-31	32
2017-03-31	31
2017-06-30	23
2017-09-30	51
2017-12-31	39
2018-03-31	13
2018-06-30	12
2018-09-30	381
2018-12-31	11
2019-03-31	7
2019-06-30	23
2019-09-30	23
2019-12-31	22
2020-03-31	24
2020-06-30	19
2020-09-30	18
2020-12-31	19
2021-03-31	19
2021-06-30	21
2021-09-30	19
2021-12-31	19
2022-03-31	18
2022-06-30	19
2022-09-30	19
2022-12-31	18
2023-03-31	18
2023-06-30	18
2023-09-30	18