Quarter	US dollars
2004-12-31	15839
2005-03-31	18709
2005-06-30	14010
2005-09-30	13765
2005-12-31	15448
2006-03-31	16077
2006-06-30	24092
2006-09-30	24690
2006-12-31	24686
2007-03-31	29398
2007-06-30	29097
2007-09-30	28992
2007-12-31	18868
2008-03-31	32072
2008-06-30	19644
2008-09-30	22009
2008-12-31	29466
2009-03-31	35998
2009-06-30	39816
2009-09-30	46463
2009-12-31	40948
2010-03-31	46805
2010-06-30	38361
2010-09-30	44016
2010-12-31	43569
2011-03-31	40631
2011-06-30	46896
2011-09-30	35735
2011-12-31	33303
2012-03-31	35235
2012-06-30	25322
2012-09-30	26408
2012-12-31	30722
2013-03-31	29981
2013-06-30	31197
2013-09-30	42739
2013-12-31	46604
2014-03-31	41426
2014-06-30	41330
2014-09-30	39807
2014-12-31	37740
2015-03-31	43370
2015-06-30	44801
2015-09-30	42701
2015-12-31	37495
2016-03-31	38172
2016-06-30	31875
2016-09-30	29383
2016-12-31	27904
2017-03-31	26460
2017-06-30	27292
2017-09-30	24826
2017-12-31	29236
2018-03-31	25554
2018-06-30	18559
2018-09-30	24620
2018-12-31	24772
2019-03-31	19159
2019-06-30	16268
2019-09-30	17098
2019-12-31	20038
2020-03-31	14009
2020-06-30	20222
2020-09-30	26104
2020-12-31	32932
2021-03-31	25611
2021-06-30	29423
2021-09-30	25136
2021-12-31	21558
2022-03-31	13629
2022-06-30	4638
2022-09-30	2024
2022-12-31	7515
2023-03-31	7822
2023-06-30	16287
2023-09-30	27316