Quarter	US dollars
2004-12-31	2849
2005-03-31	3293
2005-06-30	3540
2005-09-30	3874
2005-12-31	4225
2006-03-31	3656
2006-06-30	4246
2006-09-30	5031
2006-12-31	4503
2007-03-31	5786
2007-06-30	6677
2007-09-30	7838
2007-12-31	6534
2008-03-31	8200
2008-06-30	8116
2008-09-30	9761
2008-12-31	5921
2009-03-31	7746
2009-06-30	8441
2009-09-30	8446
2009-12-31	6330
2010-03-31	5155
2010-06-30	5101
2010-09-30	5672
2010-12-31	6012
2011-03-31	8897
2011-06-30	10091
2011-09-30	8182
2011-12-31	8184
2012-03-31	10156
2012-06-30	10651
2012-09-30	11027
2012-12-31	12186
2013-03-31	14064
2013-06-30	13496
2013-09-30	13988
2013-12-31	14401
2014-03-31	12400
2014-06-30	11532
2014-09-30	10160
2014-12-31	10038
2015-03-31	6521
2015-06-30	5667
2015-09-30	6124
2015-12-31	3702
2016-03-31	5520
2016-06-30	4085
2016-09-30	3631
2016-12-31	3739
2017-03-31	3038
2017-06-30	4478
2017-09-30	2683
2017-12-31	3187
2018-03-31	4042
2018-06-30	4599
2018-09-30	4670
2018-12-31	4295
2019-03-31	5256
2019-06-30	5705
2019-09-30	4886
2019-12-31	4015
2020-03-31	3075
2020-06-30	4091
2020-09-30	4137
2020-12-31	2872
2021-03-31	5081
2021-06-30	3611
2021-09-30	3651
2021-12-31	3985
2022-03-31	4279
2022-06-30	3023
2022-09-30	3028
2022-12-31	2389
2023-03-31	3658
2023-06-30	4622
2023-09-30	6256