Quarter	US dollars
2004-12-31	3796
2005-03-31	4242
2005-06-30	4282
2005-09-30	4066
2005-12-31	4554
2006-03-31	4935
2006-06-30	4903
2006-09-30	5067
2006-12-31	5415
2007-03-31	5807
2007-06-30	6027
2007-09-30	7528
2007-12-31	8097
2008-03-31	8284
2008-06-30	9288
2008-09-30	9137
2008-12-31	9376
2009-03-31	9021
2009-06-30	6847
2009-09-30	8300
2009-12-31	8206
2010-03-31	8102
2010-06-30	9016
2010-09-30	9278
2010-12-31	11801
2011-03-31	13638
2011-06-30	24720
2011-09-30	27407
2011-12-31	21989
2012-03-31	21410
2012-06-30	20136
2012-09-30	20346
2012-12-31	21330
2013-03-31	22536
2013-06-30	23410
2013-09-30	24378
2013-12-31	26248
2014-03-31	28484
2014-06-30	28518
2014-09-30	28188
2014-12-31	28806
2015-03-31	25800
2015-06-30	27935
2015-09-30	22063
2015-12-31	19526
2016-03-31	19673
2016-06-30	18071
2016-09-30	17764
2016-12-31	17844
2017-03-31	18568
2017-06-30	18985
2017-09-30	18218
2017-12-31	18937
2018-03-31	19246
2018-06-30	18075
2018-09-30	17047
2018-12-31	16710
2019-03-31	17528
2019-06-30	17673
2019-09-30	15198
2019-12-31	14618
2020-03-31	14179
2020-06-30	14716
2020-09-30	13446
2020-12-31	13074
2021-03-31	13301
2021-06-30	13143
2021-09-30	13008
2021-12-31	12504
2022-03-31	12645
2022-06-30	12354
2022-09-30	12482
2022-12-31	13581
2023-03-31	10509
2023-06-30	10417
2023-09-30	9824