Quarter	US dollars
2004-12-31	58050
2005-03-31	59517
2005-06-30	50104
2005-09-30	50607
2005-12-31	45301
2006-03-31	61956
2006-06-30	55145
2006-09-30	61434
2006-12-31	62094
2007-03-31	68965
2007-06-30	65350
2007-09-30	83038
2007-12-31	70818
2008-03-31	86029
2008-06-30	55784
2008-09-30	58456
2008-12-31	31519
2009-03-31	36213
2009-06-30	33904
2009-09-30	28258
2009-12-31	26244
2010-03-31	19581
2010-06-30	20033
2010-09-30	24086
2010-12-31	21209
2011-03-31	22631
2011-06-30	22612
2011-09-30	17355
2011-12-31	14442
2012-03-31	14303
2012-06-30	12530
2012-09-30	16853
2012-12-31	18711
2013-03-31	23623
2013-06-30	26316
2013-09-30	33878
2013-12-31	36300
2014-03-31	32459
2014-06-30	31382
2014-09-30	31591
2014-12-31	34708
2015-03-31	29658
2015-06-30	27678
2015-09-30	28204
2015-12-31	26151
2016-03-31	26100
2016-06-30	28273
2016-09-30	25603
2016-12-31	21896
2017-03-31	23284
2017-06-30	21475
2017-09-30	18840
2017-12-31	19876
2018-03-31	18552
2018-06-30	16670
2018-09-30	17184
2018-12-31	15582
2019-03-31	16979
2019-06-30	11295
2019-09-30	12749
2019-12-31	12085
2020-03-31	12057
2020-06-30	11234
2020-09-30	10140
2020-12-31	11797
2021-03-31	12096
2021-06-30	18728
2021-09-30	19799
2021-12-31	18439
2022-03-31	17000
2022-06-30	13114
2022-09-30	12388
2022-12-31	12337
2023-03-31	13434
2023-06-30	13366
2023-09-30	14087