Quarter	US dollars
2004-12-31	15442
2005-03-31	15265
2005-06-30	15086
2005-09-30	14945
2005-12-31	17358
2006-03-31	20064
2006-06-30	20104
2006-09-30	20666
2006-12-31	19476
2007-03-31	19238
2007-06-30	19819
2007-09-30	22831
2007-12-31	19921
2008-03-31	18406
2008-06-30	18269
2008-09-30	14838
2008-12-31	17891
2009-03-31	14053
2009-06-30	15546
2009-09-30	13591
2009-12-31	14008
2010-03-31	12947
2010-06-30	14254
2010-09-30	27815
2010-12-31	26587
2011-03-31	10665
2011-06-30	13070
2011-09-30	10061
2011-12-31	10411
2012-03-31	9159
2012-06-30	9120
2012-09-30	11246
2012-12-31	10073
2013-03-31	9572
2013-06-30	9235
2013-09-30	10094
2013-12-31	11376
2014-03-31	11604
2014-06-30	10586
2014-09-30	9964
2014-12-31	8455
2015-03-31	9155
2015-06-30	8333
2015-09-30	8195
2015-12-31	6147
2016-03-31	7176
2016-06-30	7395
2016-09-30	7454
2016-12-31	7437
2017-03-31	10508
2017-06-30	13886
2017-09-30	20254
2017-12-31	19730
2018-03-31	19844
2018-06-30	14923
2018-09-30	16342
2018-12-31	14624
2019-03-31	14971
2019-06-30	9311
2019-09-30	9863
2019-12-31	8988
2020-03-31	7150
2020-06-30	7386
2020-09-30	7338
2020-12-31	7851
2021-03-31	8022
2021-06-30	8214
2021-09-30	10089
2021-12-31	9221
2022-03-31	8597
2022-06-30	7606
2022-09-30	7330
2022-12-31	7580
2023-03-31	8588
2023-06-30	9286
2023-09-30	7367