Quarter	US dollars
2004-12-31	6
2005-03-31	8
2005-06-30	9
2005-09-30	42
2005-12-31	62
2006-03-31	94
2006-06-30	92
2006-09-30	118
2006-12-31	92
2007-03-31	75
2007-06-30	74
2007-09-30	71
2007-12-31	72
2008-03-31	18
2008-06-30	22
2008-09-30	34
2008-12-31	29
2009-03-31	24
2009-06-30	13
2009-09-30	29
2009-12-31	26
2010-03-31	35
2010-06-30	40
2010-09-30	25
2010-12-31	28
2011-03-31	42
2011-06-30	21
2011-09-30	47
2011-12-31	68
2012-03-31	82
2012-06-30	67
2012-09-30	18
2012-12-31	24
2013-03-31	169
2013-06-30	177
2013-09-30	165
2013-12-31	183
2014-03-31	227
2014-06-30	224
2014-09-30	274
2014-12-31	219
2015-03-31	183
2015-06-30	181
2015-09-30	180
2015-12-31	170
2016-03-31	145
2016-06-30	146
2016-09-30	174
2016-12-31	139
2017-03-31	148
2017-06-30	129
2017-09-30	127
2017-12-31	141
2018-03-31	147
2018-06-30	140
2018-09-30	149
2018-12-31	170
2019-03-31	164
2019-06-30	178
2019-09-30	170
2019-12-31	174
2020-03-31	167
2020-06-30	167
2020-09-30	169
2020-12-31	176
2021-03-31	179
2021-06-30	173
2021-09-30	169
2021-12-31	156
2022-03-31	158
2022-06-30	151
2022-09-30	131
2022-12-31	145
2023-03-31	133
2023-06-30	143
2023-09-30	146