Quarter	US dollars
2004-12-31	5873
2005-03-31	5875
2005-06-30	4483
2005-09-30	5255
2005-12-31	3734
2006-03-31	4189
2006-06-30	5247
2006-09-30	3546
2006-12-31	5282
2007-03-31	7651
2007-06-30	9332
2007-09-30	10474
2007-12-31	10391
2008-03-31	10762
2008-06-30	11572
2008-09-30	12095
2008-12-31	9971
2009-03-31	13183
2009-06-30	13138
2009-09-30	11064
2009-12-31	8570
2010-03-31	11208
2010-06-30	9832
2010-09-30	9760
2010-12-31	9734
2011-03-31	11049
2011-06-30	9117
2011-09-30	7612
2011-12-31	5790
2012-03-31	5221
2012-06-30	6731
2012-09-30	6316
2012-12-31	10975
2013-03-31	11135
2013-06-30	6946
2013-09-30	6816
2013-12-31	8272
2014-03-31	6279
2014-06-30	7555
2014-09-30	6983
2014-12-31	6665
2015-03-31	6899
2015-06-30	6520
2015-09-30	7339
2015-12-31	7292
2016-03-31	7675
2016-06-30	7912
2016-09-30	9148
2016-12-31	10148
2017-03-31	9469
2017-06-30	12665
2017-09-30	15619
2017-12-31	13355
2018-03-31	14357
2018-06-30	17516
2018-09-30	16707
2018-12-31	19630
2019-03-31	16659
2019-06-30	15251
2019-09-30	12480
2019-12-31	15804
2020-03-31	16322
2020-06-30	15152
2020-09-30	18620
2020-12-31	19660
2021-03-31	19782
2021-06-30	24451
2021-09-30	27431
2021-12-31	22641
2022-03-31	24564
2022-06-30	28782
2022-09-30	20990
2022-12-31	26279
2023-03-31	27781
2023-06-30	28664
2023-09-30	29733