Quarter	US dollars
2004-12-31	1686
2005-03-31	2034
2005-06-30	2020
2005-09-30	1748
2005-12-31	2328
2006-03-31	2982
2006-06-30	2863
2006-09-30	2681
2006-12-31	3143
2007-03-31	2758
2007-06-30	2859
2007-09-30	3264
2007-12-31	3805
2008-03-31	2781
2008-06-30	2515
2008-09-30	2867
2008-12-31	2464
2009-03-31	2431
2009-06-30	2312
2009-09-30	2453
2009-12-31	2422
2010-03-31	2689
2010-06-30	2737
2010-09-30	3345
2010-12-31	4172
2011-03-31	3818
2011-06-30	3439
2011-09-30	4801
2011-12-31	4600
2012-03-31	5008
2012-06-30	4907
2012-09-30	5581
2012-12-31	5764
2013-03-31	6025
2013-06-30	5217
2013-09-30	6954
2013-12-31	6033
2014-03-31	6269
2014-06-30	6540
2014-09-30	6058
2014-12-31	6268
2015-03-31	5725
2015-06-30	5472
2015-09-30	5356
2015-12-31	4800
2016-03-31	4750
2016-06-30	4273
2016-09-30	3847
2016-12-31	3883
2017-03-31	4139
2017-06-30	3805
2017-09-30	4207
2017-12-31	3791
2018-03-31	4018
2018-06-30	3589
2018-09-30	3245
2018-12-31	3409
2019-03-31	3909
2019-06-30	3687
2019-09-30	3663
2019-12-31	3520
2020-03-31	3692
2020-06-30	3815
2020-09-30	4036
2020-12-31	3984
2021-03-31	4143
2021-06-30	4223
2021-09-30	3383
2021-12-31	3197
2022-03-31	3139
2022-06-30	2945
2022-09-30	2923
2022-12-31	3257
2023-03-31	3799
2023-06-30	3304
2023-09-30	3698