Quarter	US dollars
2004-12-31	-6
2005-03-31	2
2005-06-30	-5
2005-09-30	-2
2005-12-31	3
2006-03-31	0
2006-06-30	15
2006-09-30	34
2006-12-31	23
2007-03-31	6
2007-06-30	-66
2007-09-30	-94
2007-12-31	-165
2008-03-31	-266
2008-06-30	-237
2008-09-30	-182
2008-12-31	-348
2009-03-31	-288
2009-06-30	-364
2009-09-30	-219
2009-12-31	-182
2010-03-31	-203
2010-06-30	-202
2010-09-30	-175
2010-12-31	-811
2011-03-31	-77
2011-06-30	-79
2011-09-30	-120
2011-12-31	-94
2012-03-31	-96
2012-06-30	-99
2012-09-30	-94
2012-12-31	-100
2013-03-31	-106
2013-06-30	-68
2013-09-30	-65
2013-12-31	-69
2014-03-31	-207
2014-06-30	-239
2014-09-30	-237
2014-12-31	-226
2015-03-31	-297
2015-06-30	-226
2015-09-30	-151
2015-12-31	-144
2016-03-31	-144
2016-06-30	-172
2016-09-30	-92
2016-12-31	-117
2017-03-31	-71
2017-06-30	-70
2017-09-30	-42
2017-12-31	-1
2018-03-31	8
2018-06-30	-20
2018-09-30	-23
2018-12-31	-29
2019-03-31	-44
2019-06-30	-31
2019-09-30	-23
2019-12-31	-28
2020-03-31	-15
2020-06-30	-12
2020-09-30	-22
2020-12-31	-23
2021-03-31	-17
2021-06-30	-21
2021-09-30	-23
2021-12-31	-36
2022-03-31	-47
2022-06-30	-61
2022-09-30	-45
2022-12-31	-41
2023-03-31	-31
2023-06-30	-27
2023-09-30	-25