Quarter	US dollars
2004-12-31	-8
2005-03-31	-8
2005-06-30	-4
2005-09-30	-4
2005-12-31	-5
2006-03-31	-5
2006-06-30	-4
2006-09-30	-4
2006-12-31	18
2007-03-31	14
2007-06-30	22
2007-09-30	20
2007-12-31	14
2008-03-31	4
2008-06-30	24
2008-09-30	-20
2008-12-31	-30
2009-03-31	11
2009-06-30	-46
2009-09-30	-27
2009-12-31	-139
2010-03-31	-191
2010-06-30	-183
2010-09-30	-176
2010-12-31	-169
2011-03-31	-207
2011-06-30	-191
2011-09-30	-174
2011-12-31	-158
2012-03-31	-144
2012-06-30	-143
2012-09-30	-142
2012-12-31	-234
2013-03-31	1917
2013-06-30	-41
2013-09-30	303
2013-12-31	349
2014-03-31	617
2014-06-30	-190
2014-09-30	-186
2014-12-31	-186
2015-03-31	-235
2015-06-30	-225
2015-09-30	-241
2015-12-31	-141
2016-03-31	-138
2016-06-30	-7
2016-09-30	-103
2016-12-31	-87
2017-03-31	-120
2017-06-30	-213
2017-09-30	-197
2017-12-31	-242
2018-03-31	-215
2018-06-30	-265
2018-09-30	-300
2018-12-31	-211
2019-03-31	-270
2019-06-30	-196
2019-09-30	-128
2019-12-31	-148
2020-03-31	-153
2020-06-30	-88
2020-09-30	-208
2020-12-31	-85
2021-03-31	-97
2021-06-30	-94
2021-09-30	-80
2021-12-31	-88
2022-03-31	-76
2022-06-30	-84
2022-09-30	-74
2022-12-31	-58
2023-03-31	-58
2023-06-30	-74
2023-09-30	-104