Quarter	US dollars
2004-12-31	4279
2005-03-31	3830
2005-06-30	3904
2005-09-30	4572
2005-12-31	4487
2006-03-31	5637
2006-06-30	7562
2006-09-30	8683
2006-12-31	10912
2007-03-31	10564
2007-06-30	10481
2007-09-30	13960
2007-12-31	42681
2008-03-31	107327
2008-06-30	67584
2008-09-30	39292
2008-12-31	22473
2009-03-31	18529
2009-06-30	18945
2009-09-30	13423
2009-12-31	5179
2010-03-31	4546
2010-06-30	5648
2010-09-30	13288
2010-12-31	20140
2011-03-31	19455
2011-06-30	22548
2011-09-30	22730
2011-12-31	20639
2012-03-31	29808
2012-06-30	28569
2012-09-30	28458
2012-12-31	32823
2013-03-31	50143
2013-06-30	45772
2013-09-30	45249
2013-12-31	43275
2014-03-31	34361
2014-06-30	37001
2014-09-30	32704
2014-12-31	23144
2015-03-31	19891
2015-06-30	19952
2015-09-30	19220
2015-12-31	17864
2016-03-31	19351
2016-06-30	17294
2016-09-30	17104
2016-12-31	15492
2017-03-31	15988
2017-06-30	12939
2017-09-30	13264
2017-12-31	14023
2018-03-31	9467
2018-06-30	8689
2018-09-30	8265
2018-12-31	8328
2019-03-31	8931
2019-06-30	9174
2019-09-30	9071
2019-12-31	9066
2020-03-31	9411
2020-06-30	10024
2020-09-30	9692
2020-12-31	9269
2021-03-31	10506
2021-06-30	9548
2021-09-30	10257
2021-12-31	10805
2022-03-31	11284
2022-06-30	13347
2022-09-30	14019
2022-12-31	12112
2023-03-31	12760
2023-06-30	10285
2023-09-30	10413