Quarter	US dollars
2004-12-31	4339
2005-03-31	4427
2005-06-30	4677
2005-09-30	4641
2005-12-31	4728
2006-03-31	4557
2006-06-30	3852
2006-09-30	4045
2006-12-31	3665
2007-03-31	3568
2007-06-30	4149
2007-09-30	4336
2007-12-31	4101
2008-03-31	4188
2008-06-30	4267
2008-09-30	3400
2008-12-31	2884
2009-03-31	2893
2009-06-30	2931
2009-09-30	3090
2009-12-31	3189
2010-03-31	2903
2010-06-30	3260
2010-09-30	3510
2010-12-31	4041
2011-03-31	3373
2011-06-30	3597
2011-09-30	3381
2011-12-31	3663
2012-03-31	3772
2012-06-30	3874
2012-09-30	3692
2012-12-31	3670
2013-03-31	3783
2013-06-30	3094
2013-09-30	3216
2013-12-31	3514
2014-03-31	3413
2014-06-30	3809
2014-09-30	3370
2014-12-31	3520
2015-03-31	3743
2015-06-30	3287
2015-09-30	3058
2015-12-31	2945
2016-03-31	3192
2016-06-30	3281
2016-09-30	3226
2016-12-31	3830
2017-03-31	3865
2017-06-30	4065
2017-09-30	5910
2017-12-31	5308
2018-03-31	5007
2018-06-30	4381
2018-09-30	3482
2018-12-31	3400
2019-03-31	3486
2019-06-30	3659
2019-09-30	4393
2019-12-31	4827
2020-03-31	3415
2020-06-30	3762
2020-09-30	3584
2020-12-31	4159
2021-03-31	4259
2021-06-30	4179
2021-09-30	5209
2021-12-31	5698
2022-03-31	5769
2022-06-30	5358
2022-09-30	5255
2022-12-31	4829
2023-03-31	3991
2023-06-30	3779
2023-09-30	2866