Quarter	US dollars
2004-12-31	-42249
2005-03-31	-51139
2005-06-30	-45098
2005-09-30	-50506
2005-12-31	-41757
2006-03-31	-50341
2006-06-30	-49298
2006-09-30	-52339
2006-12-31	-56747
2007-03-31	-58912
2007-06-30	-51033
2007-09-30	-60825
2007-12-31	-52928
2008-03-31	-63517
2008-06-30	-61615
2008-09-30	-53951
2008-12-31	-38089
2009-03-31	-35104
2009-06-30	-35459
2009-09-30	-33571
2009-12-31	-57330
2010-03-31	-54845
2010-06-30	-51017
2010-09-30	-61634
2010-12-31	-57258
2011-03-31	-46692
2011-06-30	-56392
2011-09-30	-56435
2011-12-31	-49806
2012-03-31	-47782
2012-06-30	-48467
2012-09-30	-48799
2012-12-31	-41136
2013-03-31	-43102
2013-06-30	-44110
2013-09-30	-41892
2013-12-31	-38514
2014-03-31	-40325
2014-06-30	-45748
2014-09-30	-42719
2014-12-31	-37467
2015-03-31	-37290
2015-06-30	-33841
2015-09-30	-25556
2015-12-31	-25158
2016-03-31	-28458
2016-06-30	-23646
2016-09-30	-20821
2016-12-31	-20354
2017-03-31	-24593
2017-06-30	-11166
2017-09-30	-12709
2017-12-31	-13827
2018-03-31	-24152
2018-06-30	-23730
2018-09-30	-24777
2018-12-31	-24676
2019-03-31	-28659
2019-06-30	-24084
2019-09-30	-23256
2019-12-31	-22872
2020-03-31	-30088
2020-06-30	-26625
2020-09-30	-29049
2020-12-31	-28352
2021-03-31	-44058
2021-06-30	-41059
2021-09-30	-40108
2021-12-31	-37120
2022-03-31	-37521
2022-06-30	-37704
2022-09-30	-41389
2022-12-31	-40005
2023-03-31	-42635
2023-06-30	-42383
2023-09-30	-41193