Quarter	US dollars
2004-12-31	-21
2005-03-31	-26
2005-06-30	-20
2005-09-30	-48
2005-12-31	-46
2006-03-31	-47
2006-06-30	-20
2006-09-30	-22
2006-12-31	-20
2007-03-31	-16
2007-06-30	-20
2007-09-30	-26
2007-12-31	-22
2008-03-31	-24
2008-06-30	-24
2008-09-30	-16
2008-12-31	-19
2009-03-31	-33
2009-06-30	-36
2009-09-30	-110
2009-12-31	-116
2010-03-31	-114
2010-06-30	-120
2010-09-30	-137
2010-12-31	-141
2011-03-31	-157
2011-06-30	-173
2011-09-30	-184
2011-12-31	-165
2012-03-31	-227
2012-06-30	-165
2012-09-30	-142
2012-12-31	-189
2013-03-31	-167
2013-06-30	-167
2013-09-30	-225
2013-12-31	-228
2014-03-31	-237
2014-06-30	-246
2014-09-30	-240
2014-12-31	-189
2015-03-31	-183
2015-06-30	-145
2015-09-30	-135
2015-12-31	-127
2016-03-31	-128
2016-06-30	-117
2016-09-30	-75
2016-12-31	-55
2017-03-31	-81
2017-06-30	-44
2017-09-30	-11
2017-12-31	-43
2018-03-31	-48
2018-06-30	-50
2018-09-30	-85
2018-12-31	-92
2019-03-31	-69
2019-06-30	-62
2019-09-30	-64
2019-12-31	-70
2020-03-31	-144
2020-06-30	-130
2020-09-30	-132
2020-12-31	-120
2021-03-31	8
2021-06-30	48
2021-09-30	26
2021-12-31	-35
2022-03-31	-221
2022-06-30	-216
2022-09-30	-242
2022-12-31	-271
2023-03-31	-232
2023-06-30	-234
2023-09-30	-167