Quarter	US dollars
2004-12-31	5228
2005-03-31	6223
2005-06-30	5386
2005-09-30	9831
2005-12-31	10003
2006-03-31	11937
2006-06-30	17185
2006-09-30	18312
2006-12-31	19756
2007-03-31	21778
2007-06-30	18373
2007-09-30	32244
2007-12-31	24960
2008-03-31	31261
2008-06-30	26395
2008-09-30	24276
2008-12-31	16647
2009-03-31	10295
2009-06-30	9660
2009-09-30	18070
2009-12-31	17931
2010-03-31	26186
2010-06-30	31312
2010-09-30	33810
2010-12-31	46448
2011-03-31	48161
2011-06-30	62090
2011-09-30	60479
2011-12-31	62908
2012-03-31	70917
2012-06-30	70316
2012-09-30	61870
2012-12-31	57532
2013-03-31	71727
2013-06-30	78309
2013-09-30	84018
2013-12-31	80566
2014-03-31	95056
2014-06-30	85625
2014-09-30	73951
2014-12-31	62911
2015-03-31	69093
2015-06-30	61123
2015-09-30	50436
2015-12-31	46117
2016-03-31	43029
2016-06-30	43052
2016-09-30	44464
2016-12-31	46781
2017-03-31	50010
2017-06-30	61136
2017-09-30	63644
2017-12-31	60306
2018-03-31	58599
2018-06-30	63097
2018-09-30	57305
2018-12-31	56865
2019-03-31	56089
2019-06-30	56419
2019-09-30	50051
2019-12-31	46530
2020-03-31	49234
2020-06-30	43544
2020-09-30	44792
2020-12-31	47889
2021-03-31	50142
2021-06-30	47203
2021-09-30	45012
2021-12-31	44908
2022-03-31	43527
2022-06-30	40968
2022-09-30	41954
2022-12-31	48782
2023-03-31	46321
2023-06-30	50003
2023-09-30	53267