Quarter	US dollars
2004-12-31	5906
2005-03-31	6291
2005-06-30	5503
2005-09-30	6208
2005-12-31	5831
2006-03-31	5937
2006-06-30	8002
2006-09-30	7491
2006-12-31	8106
2007-03-31	10868
2007-06-30	10808
2007-09-30	10980
2007-12-31	13176
2008-03-31	12003
2008-06-30	10012
2008-09-30	9616
2008-12-31	9244
2009-03-31	8432
2009-06-30	8450
2009-09-30	9145
2009-12-31	9952
2010-03-31	10995
2010-06-30	10629
2010-09-30	11717
2010-12-31	10182
2011-03-31	10173
2011-06-30	12912
2011-09-30	13979
2011-12-31	15172
2012-03-31	14174
2012-06-30	14117
2012-09-30	21081
2012-12-31	19130
2013-03-31	19149
2013-06-30	17025
2013-09-30	16327
2013-12-31	14645
2014-03-31	14806
2014-06-30	14596
2014-09-30	14067
2014-12-31	13504
2015-03-31	12629
2015-06-30	13560
2015-09-30	13231
2015-12-31	13604
2016-03-31	11852
2016-06-30	11389
2016-09-30	11600
2016-12-31	11518
2017-03-31	11496
2017-06-30	11540
2017-09-30	12269
2017-12-31	10930
2018-03-31	9987
2018-06-30	10367
2018-09-30	10145
2018-12-31	10248
2019-03-31	9813
2019-06-30	9944
2019-09-30	10816
2019-12-31	10264
2020-03-31	9974
2020-06-30	10932
2020-09-30	10825
2020-12-31	11446
2021-03-31	11222
2021-06-30	11058
2021-09-30	11101
2021-12-31	11181
2022-03-31	12304
2022-06-30	13736
2022-09-30	11984
2022-12-31	13715
2023-03-31	13799
2023-06-30	11615
2023-09-30	12690