Quarter	US dollars
2004-12-31	25164
2005-03-31	33636
2005-06-30	25489
2005-09-30	31934
2005-12-31	33779
2006-03-31	36636
2006-06-30	38493
2006-09-30	42564
2006-12-31	44731
2007-03-31	51306
2007-06-30	47295
2007-09-30	48749
2007-12-31	41050
2008-03-31	45617
2008-06-30	46674
2008-09-30	40728
2008-12-31	37554
2009-03-31	33894
2009-06-30	35050
2009-09-30	27447
2009-12-31	26549
2010-03-31	27481
2010-06-30	28510
2010-09-30	39575
2010-12-31	41949
2011-03-31	52391
2011-06-30	51864
2011-09-30	36014
2011-12-31	36105
2012-03-31	33801
2012-06-30	30803
2012-09-30	32070
2012-12-31	30391
2013-03-31	28631
2013-06-30	27361
2013-09-30	28637
2013-12-31	31392
2014-03-31	30250
2014-06-30	31551
2014-09-30	25480
2014-12-31	26673
2015-03-31	26460
2015-06-30	23781
2015-09-30	25604
2015-12-31	23704
2016-03-31	19870
2016-06-30	18707
2016-09-30	18025
2016-12-31	21619
2017-03-31	19935
2017-06-30	23161
2017-09-30	23337
2017-12-31	26977
2018-03-31	27893
2018-06-30	24345
2018-09-30	21664
2018-12-31	21823
2019-03-31	16422
2019-06-30	18705
2019-09-30	17058
2019-12-31	18203
2020-03-31	13045
2020-06-30	13083
2020-09-30	17476
2020-12-31	21097
2021-03-31	15541
2021-06-30	20010
2021-09-30	22746
2021-12-31	27916
2022-03-31	21501
2022-06-30	29943
2022-09-30	17883
2022-12-31	24710
2023-03-31	25979
2023-06-30	30097
2023-09-30	34513