Quarter	US dollars
2004-12-31	9256
2005-03-31	10044
2005-06-30	10131
2005-09-30	12116
2005-12-31	11834
2006-03-31	15834
2006-06-30	28407
2006-09-30	30065
2006-12-31	38848
2007-03-31	38846
2007-06-30	45620
2007-09-30	47930
2007-12-31	58690
2008-03-31	53402
2008-06-30	50314
2008-09-30	45283
2008-12-31	29579
2009-03-31	22336
2009-06-30	25993
2009-09-30	31799
2009-12-31	29591
2010-03-31	39129
2010-06-30	37891
2010-09-30	47429
2010-12-31	49993
2011-03-31	55530
2011-06-30	64036
2011-09-30	51785
2011-12-31	49387
2012-03-31	61768
2012-06-30	54255
2012-09-30	60664
2012-12-31	67941
2013-03-31	68122
2013-06-30	60356
2013-09-30	63299
2013-12-31	61929
2014-03-31	58084
2014-06-30	59523
2014-09-30	60549
2014-12-31	61171
2015-03-31	52933
2015-06-30	45447
2015-09-30	40455
2015-12-31	39187
2016-03-31	43061
2016-06-30	46756
2016-09-30	47700
2016-12-31	40126
2017-03-31	48850
2017-06-30	50721
2017-09-30	53447
2017-12-31	52851
2018-03-31	56149
2018-06-30	46596
2018-09-30	43839
2018-12-31	46194
2019-03-31	59855
2019-06-30	65133
2019-09-30	62015
2019-12-31	65740
2020-03-31	50663
2020-06-30	53324
2020-09-30	58162
2020-12-31	70007
2021-03-31	69801
2021-06-30	75405
2021-09-30	70695
2021-12-31	76056
2022-03-31	67530
2022-06-30	64637
2022-09-30	56469
2022-12-31	65775
2023-03-31	68954
2023-06-30	74908
2023-09-30	68339