Quarter	US dollars
2004-12-31	22138
2005-03-31	25350
2005-06-30	25292
2005-09-30	25067
2005-12-31	17564
2006-03-31	19975
2006-06-30	19195
2006-09-30	21794
2006-12-31	24455
2007-03-31	30745
2007-06-30	26840
2007-09-30	38495
2007-12-31	25989
2008-03-31	33807
2008-06-30	34886
2008-09-30	36754
2008-12-31	21426
2009-03-31	20953
2009-06-30	24094
2009-09-30	18160
2009-12-31	23243
2010-03-31	22405
2010-06-30	26204
2010-09-30	31190
2010-12-31	30601
2011-03-31	30322
2011-06-30	34394
2011-09-30	39111
2011-12-31	37221
2012-03-31	36507
2012-06-30	37723
2012-09-30	40069
2012-12-31	36089
2013-03-31	39149
2013-06-30	43036
2013-09-30	44862
2013-12-31	46050
2014-03-31	43290
2014-06-30	50128
2014-09-30	50705
2014-12-31	53244
2015-03-31	49449
2015-06-30	46852
2015-09-30	35641
2015-12-31	35487
2016-03-31	41583
2016-06-30	42366
2016-09-30	40952
2016-12-31	44128
2017-03-31	48133
2017-06-30	42586
2017-09-30	43454
2017-12-31	44114
2018-03-31	45147
2018-06-30	47598
2018-09-30	43059
2018-12-31	45597
2019-03-31	48333
2019-06-30	49465
2019-09-30	48160
2019-12-31	47058
2020-03-31	53942
2020-06-30	49235
2020-09-30	49279
2020-12-31	41168
2021-03-31	52961
2021-06-30	48723
2021-09-30	47700
2021-12-31	42676
2022-03-31	47877
2022-06-30	46258
2022-09-30	46699
2022-12-31	42941
2023-03-31	46743
2023-06-30	48668
2023-09-30	50006