Quarter	US dollars
2004-12-31	4151
2005-03-31	5399
2005-06-30	4497
2005-09-30	4558
2005-12-31	4957
2006-03-31	4983
2006-06-30	5835
2006-09-30	9378
2006-12-31	8636
2007-03-31	6464
2007-06-30	8276
2007-09-30	17118
2007-12-31	11816
2008-03-31	15797
2008-06-30	13937
2008-09-30	15025
2008-12-31	11364
2009-03-31	9030
2009-06-30	11109
2009-09-30	10202
2009-12-31	12171
2010-03-31	12570
2010-06-30	17142
2010-09-30	22267
2010-12-31	20863
2011-03-31	21721
2011-06-30	22674
2011-09-30	16398
2011-12-31	18960
2012-03-31	21066
2012-06-30	18839
2012-09-30	18736
2012-12-31	16155
2013-03-31	16017
2013-06-30	15467
2013-09-30	15600
2013-12-31	19734
2014-03-31	17542
2014-06-30	18415
2014-09-30	18527
2014-12-31	17047
2015-03-31	13817
2015-06-30	15930
2015-09-30	17652
2015-12-31	16501
2016-03-31	16719
2016-06-30	12944
2016-09-30	13738
2016-12-31	13648
2017-03-31	13145
2017-06-30	14972
2017-09-30	15522
2017-12-31	18309
2018-03-31	17694
2018-06-30	17944
2018-09-30	16668
2018-12-31	19939
2019-03-31	22404
2019-06-30	21635
2019-09-30	23688
2019-12-31	22044
2020-03-31	24264
2020-06-30	22498
2020-09-30	20662
2020-12-31	20757
2021-03-31	21640
2021-06-30	22712
2021-09-30	21766
2021-12-31	25055
2022-03-31	22400
2022-06-30	23060
2022-09-30	19323
2022-12-31	19612
2023-03-31	23375
2023-06-30	23913
2023-09-30	28403