Quarter	US dollars
2004-12-31	42405
2005-03-31	37625
2005-06-30	46938
2005-09-30	45145
2005-12-31	37906
2006-03-31	35774
2006-06-30	44361
2006-09-30	37351
2006-12-31	34952
2007-03-31	45031
2007-06-30	60282
2007-09-30	67583
2007-12-31	78587
2008-03-31	121436
2008-06-30	135962
2008-09-30	121842
2008-12-31	249790
2009-03-31	170794
2009-06-30	128585
2009-09-30	124670
2009-12-31	109482
2010-03-31	104563
2010-06-30	121593
2010-09-30	135944
2010-12-31	112838
2011-03-31	101088
2011-06-30	107082
2011-09-30	140457
2011-12-31	133248
2012-03-31	129628
2012-06-30	125022
2012-09-30	89488
2012-12-31	95113
2013-03-31	87077
2013-06-30	69606
2013-09-30	65134
2013-12-31	60843
2014-03-31	63664
2014-06-30	73984
2014-09-30	75611
2014-12-31	77569
2015-03-31	84289
2015-06-30	65947
2015-09-30	67500
2015-12-31	59618
2016-03-31	68169
2016-06-30	69098
2016-09-30	63908
2016-12-31	55494
2017-03-31	47774
2017-06-30	47324
2017-09-30	42126
2017-12-31	44967
2018-03-31	40717
2018-06-30	27602
2018-09-30	39943
2018-12-31	41695
2019-03-31	32618
2019-06-30	38762
2019-09-30	42377
2019-12-31	44789
2020-03-31	58102
2020-06-30	55215
2020-09-30	50839
2020-12-31	52113
2021-03-31	44873
2021-06-30	37094
2021-09-30	34561
2021-12-31	33139
2022-03-31	33077
2022-06-30	32513
2022-09-30	39510
2022-12-31	33573
2023-03-31	29064
2023-06-30	31510
2023-09-30	33521