Quarter	US dollars
2004-12-31	6457
2005-03-31	8917
2005-06-30	9178
2005-09-30	9697
2005-12-31	9211
2006-03-31	11581
2006-06-30	11215
2006-09-30	12037
2006-12-31	15175
2007-03-31	15942
2007-06-30	18003
2007-09-30	18275
2007-12-31	18890
2008-03-31	21602
2008-06-30	23676
2008-09-30	22021
2008-12-31	14436
2009-03-31	18064
2009-06-30	33898
2009-09-30	38985
2009-12-31	39212
2010-03-31	47188
2010-06-30	46459
2010-09-30	59475
2010-12-31	55353
2011-03-31	60829
2011-06-30	68906
2011-09-30	58758
2011-12-31	58999
2012-03-31	66562
2012-06-30	56652
2012-09-30	57080
2012-12-31	57186
2013-03-31	48922
2013-06-30	39437
2013-09-30	42002
2013-12-31	43239
2014-03-31	46729
2014-06-30	41883
2014-09-30	40316
2014-12-31	38290
2015-03-31	39058
2015-06-30	33663
2015-09-30	26085
2015-12-31	25604
2016-03-31	31098
2016-06-30	28859
2016-09-30	18364
2016-12-31	14478
2017-03-31	17391
2017-06-30	15746
2017-09-30	17249
2017-12-31	18090
2018-03-31	20659
2018-06-30	19638
2018-09-30	21480
2018-12-31	24007
2019-03-31	25153
2019-06-30	25642
2019-09-30	27625
2019-12-31	20767
2020-03-31	16160
2020-06-30	16575
2020-09-30	16786
2020-12-31	24223
2021-03-31	23121
2021-06-30	22911
2021-09-30	22402
2021-12-31	36068
2022-03-31	31287
2022-06-30	17290
2022-09-30	35962
2022-12-31	38705
2023-03-31	40621
2023-06-30	42097
2023-09-30	27616