Quarter	US dollars
2004-12-31	6025
2005-03-31	6017
2005-06-30	5758
2005-09-30	6295
2005-12-31	5871
2006-03-31	5597
2006-06-30	6268
2006-09-30	8059
2006-12-31	8675
2007-03-31	8316
2007-06-30	8672
2007-09-30	10048
2007-12-31	12121
2008-03-31	11844
2008-06-30	10354
2008-09-30	14570
2008-12-31	9337
2009-03-31	7332
2009-06-30	8797
2009-09-30	8868
2009-12-31	7711
2010-03-31	8234
2010-06-30	10559
2010-09-30	11013
2010-12-31	12798
2011-03-31	18072
2011-06-30	22390
2011-09-30	19282
2011-12-31	14289
2012-03-31	18367
2012-06-30	18977
2012-09-30	18450
2012-12-31	15101
2013-03-31	18834
2013-06-30	18437
2013-09-30	19112
2013-12-31	17582
2014-03-31	18777
2014-06-30	19932
2014-09-30	18401
2014-12-31	18185
2015-03-31	18044
2015-06-30	17432
2015-09-30	13852
2015-12-31	13665
2016-03-31	15244
2016-06-30	16796
2016-09-30	17264
2016-12-31	15552
2017-03-31	16574
2017-06-30	24554
2017-09-30	25066
2017-12-31	25703
2018-03-31	24673
2018-06-30	25748
2018-09-30	25936
2018-12-31	23978
2019-03-31	25285
2019-06-30	29015
2019-09-30	31012
2019-12-31	30824
2020-03-31	34926
2020-06-30	34453
2020-09-30	28443
2020-12-31	28906
2021-03-31	29195
2021-06-30	32826
2021-09-30	37157
2021-12-31	36012
2022-03-31	39799
2022-06-30	41419
2022-09-30	41475
2022-12-31	41563
2023-03-31	46641
2023-06-30	44321
2023-09-30	41772