Quarter	US dollars
2004-12-31	2433
2005-03-31	3352
2005-06-30	3248
2005-09-30	3317
2005-12-31	3277
2006-03-31	5295
2006-06-30	6294
2006-09-30	7712
2006-12-31	10237
2007-03-31	11954
2007-06-30	12416
2007-09-30	11532
2007-12-31	9375
2008-03-31	7336
2008-06-30	6939
2008-09-30	6645
2008-12-31	6249
2009-03-31	6723
2009-06-30	7483
2009-09-30	6111
2009-12-31	5930
2010-03-31	7207
2010-06-30	8895
2010-09-30	9001
2010-12-31	9310
2011-03-31	8794
2011-06-30	9646
2011-09-30	6484
2011-12-31	7135
2012-03-31	6712
2012-06-30	6367
2012-09-30	6335
2012-12-31	5122
2013-03-31	3694
2013-06-30	5096
2013-09-30	5815
2013-12-31	6372
2014-03-31	8138
2014-06-30	10600
2014-09-30	10319
2014-12-31	12817
2015-03-31	12200
2015-06-30	18305
2015-09-30	14947
2015-12-31	18673
2016-03-31	20791
2016-06-30	17231
2016-09-30	14897
2016-12-31	13141
2017-03-31	14479
2017-06-30	14286
2017-09-30	16789
2017-12-31	16785
2018-03-31	16885
2018-06-30	17009
2018-09-30	17535
2018-12-31	20147
2019-03-31	18912
2019-06-30	19736
2019-09-30	17425
2019-12-31	16162
2020-03-31	14617
2020-06-30	15487
2020-09-30	17266
2020-12-31	17660
2021-03-31	20313
2021-06-30	20143
2021-09-30	19656
2021-12-31	16276
2022-03-31	15996
2022-06-30	14947
2022-09-30	12881
2022-12-31	13840
2023-03-31	14869
2023-06-30	16662
2023-09-30	15808