Quarter	US dollars
2004-12-31	9790
2005-03-31	17318
2005-06-30	14686
2005-09-30	13193
2005-12-31	14713
2006-03-31	16610
2006-06-30	18002
2006-09-30	19771
2006-12-31	18691
2007-03-31	15006
2007-06-30	18589
2007-09-30	24049
2007-12-31	17484
2008-03-31	20722
2008-06-30	18440
2008-09-30	19648
2008-12-31	20927
2009-03-31	28315
2009-06-30	35312
2009-09-30	31551
2009-12-31	29843
2010-03-31	23421
2010-06-30	21853
2010-09-30	25956
2010-12-31	27457
2011-03-31	20890
2011-06-30	23618
2011-09-30	21058
2011-12-31	14691
2012-03-31	21752
2012-06-30	14732
2012-09-30	13079
2012-12-31	14517
2013-03-31	12491
2013-06-30	6517
2013-09-30	12711
2013-12-31	16345
2014-03-31	16346
2014-06-30	15828
2014-09-30	14289
2014-12-31	12234
2015-03-31	13582
2015-06-30	11704
2015-09-30	10244
2015-12-31	9198
2016-03-31	9301
2016-06-30	11146
2016-09-30	10064
2016-12-31	11119
2017-03-31	10313
2017-06-30	11436
2017-09-30	17202
2017-12-31	11909
2018-03-31	16948
2018-06-30	17132
2018-09-30	17798
2018-12-31	16951
2019-03-31	15761
2019-06-30	11075
2019-09-30	12564
2019-12-31	13143
2020-03-31	18215
2020-06-30	17257
2020-09-30	11810
2020-12-31	9926
2021-03-31	12212
2021-06-30	17658
2021-09-30	18919
2021-12-31	20314
2022-03-31	18485
2022-06-30	8494
2022-09-30	10947
2022-12-31	9858
2023-03-31	11527
2023-06-30	17451
2023-09-30	16169