Quarter	US dollars
2004-12-31	52058
2005-03-31	53166
2005-06-30	52773
2005-09-30	58140
2005-12-31	60721
2006-03-31	64985
2006-06-30	73787
2006-09-30	74816
2006-12-31	82073
2007-03-31	87921
2007-06-30	94100
2007-09-30	101554
2007-12-31	107602
2008-03-31	117658
2008-06-30	118883
2008-09-30	110332
2008-12-31	118314
2009-03-31	113228
2009-06-30	117216
2009-09-30	123098
2009-12-31	121065
2010-03-31	115002
2010-06-30	107767
2010-09-30	115404
2010-12-31	94562
2011-03-31	98423
2011-06-30	98715
2011-09-30	92362
2011-12-31	88986
2012-03-31	97455
2012-06-30	87103
2012-09-30	85628
2012-12-31	84085
2013-03-31	81513
2013-06-30	79950
2013-09-30	81900
2013-12-31	83645
2014-03-31	83588
2014-06-30	83006
2014-09-30	72959
2014-12-31	64826
2015-03-31	51825
2015-06-30	52463
2015-09-30	53128
2015-12-31	44436
2016-03-31	45905
2016-06-30	45578
2016-09-30	49628
2016-12-31	41380
2017-03-31	42606
2017-06-30	45451
2017-09-30	44919
2017-12-31	43782
2018-03-31	43417
2018-06-30	42568
2018-09-30	37871
2018-12-31	37183
2019-03-31	36186
2019-06-30	38045
2019-09-30	35188
2019-12-31	38783
2020-03-31	36958
2020-06-30	38229
2020-09-30	40337
2020-12-31	42388
2021-03-31	43499
2021-06-30	42923
2021-09-30	43622
2021-12-31	38756
2022-03-31	39312
2022-06-30	34498
2022-09-30	28004
2022-12-31	22561
2023-03-31	17959
2023-06-30	16276
2023-09-30	9786