Quarter	US dollars
2004-12-31	12124
2005-03-31	16312
2005-06-30	12336
2005-09-30	11702
2005-12-31	11280
2006-03-31	11769
2006-06-30	11868
2006-09-30	13799
2006-12-31	10495
2007-03-31	12372
2007-06-30	10951
2007-09-30	12917
2007-12-31	10030
2008-03-31	16190
2008-06-30	13395
2008-09-30	13681
2008-12-31	7332
2009-03-31	11857
2009-06-30	17606
2009-09-30	20687
2009-12-31	22903
2010-03-31	16717
2010-06-30	18209
2010-09-30	17624
2010-12-31	19505
2011-03-31	11386
2011-06-30	20910
2011-09-30	20493
2011-12-31	13174
2012-03-31	20288
2012-06-30	26011
2012-09-30	24466
2012-12-31	22444
2013-03-31	19901
2013-06-30	16050
2013-09-30	20628
2013-12-31	23865
2014-03-31	15022
2014-06-30	23199
2014-09-30	19638
2014-12-31	21208
2015-03-31	19892
2015-06-30	19918
2015-09-30	16436
2015-12-31	16141
2016-03-31	17774
2016-06-30	19725
2016-09-30	17802
2016-12-31	22222
2017-03-31	23273
2017-06-30	19055
2017-09-30	24396
2017-12-31	22247
2018-03-31	28900
2018-06-30	28567
2018-09-30	24709
2018-12-31	28050
2019-03-31	26146
2019-06-30	21438
2019-09-30	22992
2019-12-31	26634
2020-03-31	25613
2020-06-30	23477
2020-09-30	21547
2020-12-31	19564
2021-03-31	26052
2021-06-30	29587
2021-09-30	32220
2021-12-31	36414
2022-03-31	35078
2022-06-30	20759
2022-09-30	20802
2022-12-31	18494
2023-03-31	13184
2023-06-30	18420
2023-09-30	15857