Quarter	US dollars
2004-12-31	5211
2005-03-31	6081
2005-06-30	5421
2005-09-30	7027
2005-12-31	6458
2006-03-31	7540
2006-06-30	6482
2006-09-30	6785
2006-12-31	6891
2007-03-31	9856
2007-06-30	7311
2007-09-30	13942
2007-12-31	8828
2008-03-31	10711
2008-06-30	11650
2008-09-30	9374
2008-12-31	4547
2009-03-31	5775
2009-06-30	4315
2009-09-30	7498
2009-12-31	11006
2010-03-31	14456
2010-06-30	15125
2010-09-30	14039
2010-12-31	15574
2011-03-31	18082
2011-06-30	18707
2011-09-30	17520
2011-12-31	19595
2012-03-31	23235
2012-06-30	23618
2012-09-30	21976
2012-12-31	24149
2013-03-31	22615
2013-06-30	26603
2013-09-30	28221
2013-12-31	26177
2014-03-31	24304
2014-06-30	26217
2014-09-30	25386
2014-12-31	22756
2015-03-31	23017
2015-06-30	24993
2015-09-30	19131
2015-12-31	19029
2016-03-31	21594
2016-06-30	21895
2016-09-30	21779
2016-12-31	20765
2017-03-31	22703
2017-06-30	26301
2017-09-30	25297
2017-12-31	22670
2018-03-31	25487
2018-06-30	26584
2018-09-30	25112
2018-12-31	25156
2019-03-31	25810
2019-06-30	25185
2019-09-30	22401
2019-12-31	19413
2020-03-31	25752
2020-06-30	20432
2020-09-30	21913
2020-12-31	19581
2021-03-31	22298
2021-06-30	20180
2021-09-30	19004
2021-12-31	19054
2022-03-31	21220
2022-06-30	20323
2022-09-30	24956
2022-12-31	26677
2023-03-31	25283
2023-06-30	28287
2023-09-30	28484