Quarter	US dollars
2004-12-31	19669
2005-03-31	19543
2005-06-30	15808
2005-09-30	17433
2005-12-31	21306
2006-03-31	23031
2006-06-30	33284
2006-09-30	27798
2006-12-31	29678
2007-03-31	33540
2007-06-30	41534
2007-09-30	49213
2007-12-31	42516
2008-03-31	62580
2008-06-30	73787
2008-09-30	69138
2008-12-31	68413
2009-03-31	29162
2009-06-30	29194
2009-09-30	27831
2009-12-31	28370
2010-03-31	36929
2010-06-30	26152
2010-09-30	32573
2010-12-31	28691
2011-03-31	28322
2011-06-30	22552
2011-09-30	23060
2011-12-31	24993
2012-03-31	32336
2012-06-30	22541
2012-09-30	22581
2012-12-31	29636
2013-03-31	30814
2013-06-30	29313
2013-09-30	26882
2013-12-31	30377
2014-03-31	24903
2014-06-30	26406
2014-09-30	26664
2014-12-31	21523
2015-03-31	24759
2015-06-30	24040
2015-09-30	25479
2015-12-31	26104
2016-03-31	24894
2016-06-30	24345
2016-09-30	26360
2016-12-31	26744
2017-03-31	24111
2017-06-30	29138
2017-09-30	33089
2017-12-31	32104
2018-03-31	33140
2018-06-30	36521
2018-09-30	34285
2018-12-31	38675
2019-03-31	34245
2019-06-30	33141
2019-09-30	37746
2019-12-31	35617
2020-03-31	38594
2020-06-30	31444
2020-09-30	35156
2020-12-31	36754
2021-03-31	39368
2021-06-30	44548
2021-09-30	46208
2021-12-31	40238
2022-03-31	45130
2022-06-30	50371
2022-09-30	45752
2022-12-31	51237
2023-03-31	54870
2023-06-30	56467
2023-09-30	59577