Quarter	US dollars
2004-12-31	36192
2005-03-31	35572
2005-06-30	35300
2005-09-30	34366
2005-12-31	30152
2006-03-31	35630
2006-06-30	38164
2006-09-30	39017
2006-12-31	39473
2007-03-31	37459
2007-06-30	40156
2007-09-30	41143
2007-12-31	43238
2008-03-31	51548
2008-06-30	44797
2008-09-30	43303
2008-12-31	41541
2009-03-31	40004
2009-06-30	39795
2009-09-30	39547
2009-12-31	29780
2010-03-31	30915
2010-06-30	26261
2010-09-30	28321
2010-12-31	24581
2011-03-31	25935
2011-06-30	25046
2011-09-30	23325
2011-12-31	19829
2012-03-31	18627
2012-06-30	19231
2012-09-30	18739
2012-12-31	20758
2013-03-31	20824
2013-06-30	23917
2013-09-30	23462
2013-12-31	24990
2014-03-31	25040
2014-06-30	23731
2014-09-30	21281
2014-12-31	24071
2015-03-31	21846
2015-06-30	22571
2015-09-30	21366
2015-12-31	20038
2016-03-31	20634
2016-06-30	23960
2016-09-30	21200
2016-12-31	24611
2017-03-31	24145
2017-06-30	22358
2017-09-30	21891
2017-12-31	23372
2018-03-31	25046
2018-06-30	25263
2018-09-30	28540
2018-12-31	29798
2019-03-31	26764
2019-06-30	26823
2019-09-30	25516
2019-12-31	25415
2020-03-31	23751
2020-06-30	21613
2020-09-30	22141
2020-12-31	29464
2021-03-31	24776
2021-06-30	25250
2021-09-30	29446
2021-12-31	32602
2022-03-31	33620
2022-06-30	34741
2022-09-30	34484
2022-12-31	29739
2023-03-31	31350
2023-06-30	32947
2023-09-30	33868