Quarter	US dollars
2004-12-31	8578
2005-03-31	8371
2005-06-30	8468
2005-09-30	9978
2005-12-31	14924
2006-03-31	18833
2006-06-30	21425
2006-09-30	23543
2006-12-31	25699
2007-03-31	30571
2007-06-30	44388
2007-09-30	43168
2007-12-31	43201
2008-03-31	43411
2008-06-30	47446
2008-09-30	45096
2008-12-31	39360
2009-03-31	38552
2009-06-30	35047
2009-09-30	34420
2009-12-31	37825
2010-03-31	31646
2010-06-30	26403
2010-09-30	28624
2010-12-31	36797
2011-03-31	36252
2011-06-30	41945
2011-09-30	55143
2011-12-31	48025
2012-03-31	46907
2012-06-30	44774
2012-09-30	43953
2012-12-31	55390
2013-03-31	106706
2013-06-30	100827
2013-09-30	93394
2013-12-31	85618
2014-03-31	80055
2014-06-30	77841
2014-09-30	70678
2014-12-31	60300
2015-03-31	50318
2015-06-30	50047
2015-09-30	48508
2015-12-31	44313
2016-03-31	50056
2016-06-30	45116
2016-09-30	44562
2016-12-31	40681
2017-03-31	42132
2017-06-30	33657
2017-09-30	34790
2017-12-31	37321
2018-03-31	25080
2018-06-30	23183
2018-09-30	29518
2018-12-31	24745
2019-03-31	25053
2019-06-30	27955
2019-09-30	30328
2019-12-31	25589
2020-03-31	25924
2020-06-30	26526
2020-09-30	28381
2020-12-31	27295
2021-03-31	36806
2021-06-30	35556
2021-09-30	37349
2021-12-31	37318
2022-03-31	35320
2022-06-30	32431
2022-09-30	33530
2022-12-31	33851
2023-03-31	36109
2023-06-30	32340
2023-09-30	31881