Quarter	US dollars
2004-12-31	3615
2005-03-31	4904
2005-06-30	4107
2005-09-30	4268
2005-12-31	3912
2006-03-31	4185
2006-06-30	4964
2006-09-30	6356
2006-12-31	7482
2007-03-31	5431
2007-06-30	7985
2007-09-30	9965
2007-12-31	8491
2008-03-31	12203
2008-06-30	11604
2008-09-30	11650
2008-12-31	10796
2009-03-31	10528
2009-06-30	8542
2009-09-30	7928
2009-12-31	9049
2010-03-31	9898
2010-06-30	8935
2010-09-30	9289
2010-12-31	8845
2011-03-31	10448
2011-06-30	11551
2011-09-30	10008
2011-12-31	8516
2012-03-31	9282
2012-06-30	12659
2012-09-30	14959
2012-12-31	13935
2013-03-31	11123
2013-06-30	10415
2013-09-30	15135
2013-12-31	11928
2014-03-31	11764
2014-06-30	11850
2014-09-30	10097
2014-12-31	12767
2015-03-31	13223
2015-06-30	11879
2015-09-30	11430
2015-12-31	12289
2016-03-31	11836
2016-06-30	12783
2016-09-30	13541
2016-12-31	11126
2017-03-31	10653
2017-06-30	13156
2017-09-30	15839
2017-12-31	14818
2018-03-31	16858
2018-06-30	13495
2018-09-30	14743
2018-12-31	15574
2019-03-31	16979
2019-06-30	19297
2019-09-30	21564
2019-12-31	19535
2020-03-31	20584
2020-06-30	19760
2020-09-30	16384
2020-12-31	16616
2021-03-31	16962
2021-06-30	17044
2021-09-30	15024
2021-12-31	18315
2022-03-31	18375
2022-06-30	17046
2022-09-30	15027
2022-12-31	19982
2023-03-31	17205
2023-06-30	14834
2023-09-30	17036