Quarter	US dollars
2004-12-31	67648
2005-03-31	77767
2005-06-30	80433
2005-09-30	85654
2005-12-31	65924
2006-03-31	83825
2006-06-30	85294
2006-09-30	96165
2006-12-31	92762
2007-06-30	118951
2007-09-30	121325
2007-12-31	123997
2008-03-31	133614
2008-06-30	102892
2008-09-30	108052
2008-12-31	106109
2009-03-31	78851
2009-06-30	83908
2009-09-30	91656
2009-12-31	78566
2010-03-31	84098
2010-06-30	79236
2010-09-30	88296
2010-12-31	66612
2011-03-31	79930
2011-06-30	82555
2011-09-30	78297
2011-12-31	67809
2012-03-31	74069
2012-06-30	73138
2012-09-30	78504
2012-12-31	79668
2013-03-31	76142
2013-06-30	68100
2013-09-30	70389
2013-12-31	67580
2014-03-31	73365
2014-06-30	70983
2014-09-30	70602
2014-12-31	68750
2015-03-31	79336
2015-06-30	69121
2015-09-30	64523
2015-12-31	55546
2016-03-31	65374
2016-06-30	58717
2016-09-30	54015
2016-12-31	42961
2017-03-31	43706
2017-06-30	45903
2017-09-30	42855
2017-12-31	42584
2018-03-31	45651
2018-06-30	39580
2018-09-30	40814
2018-12-31	37183
2019-03-31	42538
2019-06-30	45314
2019-09-30	51914
2019-12-31	48346
2020-03-31	50914
2020-06-30	52474
2020-09-30	55938
2020-12-31	52248
2021-03-31	45524
2021-06-30	41681
2021-09-30	45004
2021-12-31	38804
2022-03-31	37779
2022-06-30	24879
2022-09-30	23209
2022-12-31	25453
2023-03-31	28445
2023-06-30	30400
2023-09-30	30355