Quarter	US dollars
2004-12-31	1062
2005-03-31	945
2005-06-30	914
2005-09-30	1447
2005-12-31	1255
2006-03-31	1159
2006-06-30	1426
2006-09-30	1330
2006-12-31	1656
2007-03-31	1832
2007-06-30	2067
2007-09-30	2530
2007-12-31	2757
2008-03-31	2781
2008-06-30	3007
2008-09-30	3439
2008-12-31	3125
2009-03-31	3041
2009-06-30	2887
2009-09-30	3141
2009-12-31	3029
2010-03-31	3945
2010-06-30	4167
2010-09-30	4356
2010-12-31	5287
2011-03-31	4024
2011-06-30	3680
2011-09-30	7417
2011-12-31	4238
2012-03-31	3196
2012-06-30	3493
2012-09-30	3738
2012-12-31	3371
2013-03-31	3458
2013-06-30	3455
2013-09-30	3257
2013-12-31	3225
2014-03-31	4952
2014-06-30	4850
2014-09-30	5442
2014-12-31	5418
2015-03-31	5069
2015-06-30	4885
2015-09-30	4377
2015-12-31	5465
2016-03-31	4979
2016-06-30	6923
2016-09-30	6667
2016-12-31	6646
2017-03-31	7974
2017-06-30	10813
2017-09-30	10856
2017-12-31	13137
2018-03-31	11458
2018-06-30	10932
2018-09-30	9618
2018-12-31	9112
2019-03-31	8421
2019-06-30	9233
2019-09-30	7202
2019-12-31	7745
2020-03-31	9419
2020-06-30	8264
2020-09-30	7606
2020-12-31	7609
2021-03-31	6847
2021-06-30	7729
2021-09-30	7612
2021-12-31	7676
2022-03-31	7947
2022-06-30	8821
2022-09-30	9386
2022-12-31	11486
2023-03-31	10852
2023-06-30	12432
2023-09-30	12543