Quarter	US dollars
2004-12-31	49894
2005-03-31	54016
2005-06-30	50912
2005-09-30	58194
2005-12-31	39454
2006-03-31	54472
2006-06-30	49516
2006-09-30	56543
2006-12-31	59642
2007-03-31	65919
2007-06-30	78460
2007-09-30	81594
2007-12-31	82238
2008-03-31	87480
2008-06-30	51102
2008-09-30	65531
2008-12-31	46850
2009-03-31	30224
2009-06-30	36641
2009-09-30	39949
2009-12-31	31243
2010-03-31	41169
2010-06-30	31229
2010-09-30	34968
2010-12-31	30150
2011-03-31	37725
2011-06-30	40662
2011-09-30	32326
2011-12-31	18003
2012-03-31	17186
2012-06-30	14585
2012-09-30	16654
2012-12-31	13014
2013-03-31	12332
2013-06-30	12214
2013-09-30	12803
2013-12-31	13336
2014-03-31	22877
2014-06-30	19217
2014-09-30	21573
2014-12-31	18500
2015-03-31	18511
2015-06-30	21085
2015-09-30	19850
2015-12-31	15818
2016-03-31	19183
2016-06-30	15841
2016-09-30	13335
2016-12-31	11848
2017-03-31	15330
2017-06-30	15471
2017-09-30	15377
2017-12-31	13856
2018-03-31	15596
2018-06-30	14204
2018-09-30	14242
2018-12-31	12925
2019-03-31	13786
2019-06-30	13797
2019-09-30	14717
2019-12-31	13746
2020-03-31	15995
2020-06-30	15147
2020-09-30	17036
2020-12-31	16044
2021-03-31	18970
2021-06-30	16230
2021-09-30	17134
2021-12-31	14400
2022-03-31	15328
2022-06-30	13295
2022-09-30	13438
2022-12-31	13033
2023-03-31	15062
2023-06-30	15841
2023-09-30	15349