Quarter	US dollars
2004-12-31	17039
2005-03-31	17356
2005-06-30	14715
2005-09-30	17646
2005-12-31	15737
2006-03-31	18037
2006-06-30	18594
2006-09-30	19125
2006-12-31	21435
2007-03-31	25956
2007-06-30	23369
2007-09-30	37547
2007-12-31	34538
2008-03-31	40446
2008-06-30	40972
2008-09-30	37062
2008-12-31	33309
2009-03-31	33813
2009-06-30	33628
2009-09-30	38684
2009-12-31	39613
2010-03-31	44909
2010-06-30	48863
2010-09-30	52877
2010-12-31	59109
2011-03-31	57836
2011-06-30	70820
2011-09-30	73162
2011-12-31	67718
2012-03-31	68007
2012-06-30	71134
2012-09-30	71621
2012-12-31	77540
2013-03-31	84025
2013-06-30	84691
2013-09-30	86881
2013-12-31	84779
2014-03-31	84562
2014-06-30	85150
2014-09-30	83758
2014-12-31	79916
2015-03-31	79564
2015-06-30	80426
2015-09-30	70964
2015-12-31	70684
2016-03-31	71395
2016-06-30	70991
2016-09-30	66545
2016-12-31	64638
2017-03-31	68507
2017-06-30	63005
2017-09-30	61141
2017-12-31	59033
2018-03-31	61682
2018-06-30	62102
2018-09-30	62865
2018-12-31	63057
2019-03-31	66182
2019-06-30	61021
2019-09-30	61922
2019-12-31	57264
2020-03-31	64834
2020-06-30	62287
2020-09-30	62012
2020-12-31	59127
2021-03-31	68434
2021-06-30	67630
2021-09-30	67745
2021-12-31	66473
2022-03-31	69377
2022-06-30	64942
2022-09-30	69170
2022-12-31	68168
2023-03-31	65871
2023-06-30	67737
2023-09-30	67136