Quarter	US dollars
2004-12-31	4207
2005-03-31	3991
2005-06-30	5297
2005-09-30	5968
2005-12-31	5629
2006-03-31	4739
2006-06-30	5145
2006-09-30	4857
2006-12-31	9366
2007-03-31	10291
2007-06-30	11326
2007-09-30	11821
2007-12-31	11601
2008-03-31	15381
2008-06-30	16858
2008-09-30	17456
2008-12-31	16626
2009-03-31	11875
2009-06-30	9609
2009-09-30	8024
2009-12-31	8699
2010-03-31	9808
2010-06-30	9215
2010-09-30	9765
2010-12-31	15044
2011-03-31	15063
2011-06-30	21114
2011-09-30	18642
2011-12-31	17335
2012-03-31	19311
2012-06-30	18938
2012-09-30	19137
2012-12-31	17437
2013-03-31	19520
2013-06-30	18890
2013-09-30	21745
2013-12-31	20308
2014-03-31	19262
2014-06-30	24454
2014-09-30	25579
2014-12-31	27500
2015-03-31	24692
2015-06-30	20180
2015-09-30	17619
2015-12-31	16052
2016-03-31	15284
2016-06-30	12766
2016-09-30	8558
2016-12-31	8709
2017-03-31	8557
2017-06-30	7808
2017-09-30	9163
2017-12-31	8922
2018-03-31	9444
2018-06-30	8137
2018-09-30	8847
2018-12-31	9939
2019-03-31	10545
2019-06-30	7842
2019-09-30	7534
2019-12-31	12806
2020-03-31	9999
2020-06-30	7763
2020-09-30	6321
2020-12-31	6434
2021-03-31	4823
2021-06-30	6057
2021-09-30	5179
2021-12-31	6973
2022-03-31	6680
2022-06-30	8233
2022-09-30	8363
2022-12-31	8010
2023-03-31	8298
2023-06-30	8244
2023-09-30	7107