Quarter	US dollars
2004-12-31	37978
2005-03-31	44727
2005-06-30	43454
2005-09-30	47751
2005-12-31	50564
2006-03-31	57051
2006-06-30	62632
2006-09-30	64787
2006-12-31	75628
2007-03-31	82514
2007-06-30	92932
2007-09-30	99843
2007-12-31	93238
2008-03-31	102833
2008-06-30	114680
2008-09-30	100731
2008-12-31	95449
2009-03-31	91372
2009-06-30	98469
2009-09-30	94407
2009-12-31	83958
2010-03-31	79016
2010-06-30	70788
2010-09-30	84262
2010-12-31	80849
2011-03-31	81703
2011-06-30	79055
2011-09-30	71409
2011-12-31	68743
2012-03-31	67798
2012-06-30	63440
2012-09-30	58744
2012-12-31	58973
2013-03-31	55906
2013-06-30	52575
2013-09-30	50869
2013-12-31	47149
2014-03-31	44957
2014-06-30	44432
2014-09-30	38111
2014-12-31	34667
2015-03-31	13324
2015-06-30	13252
2015-09-30	12271
2015-12-31	11922
2016-03-31	12703
2016-06-30	12245
2016-09-30	12053
2016-12-31	11468
2017-03-31	11622
2017-06-30	11223
2017-09-30	9947
2017-12-31	10665
2018-03-31	11078
2018-06-30	9030
2018-09-30	9109
2018-12-31	9584
2019-03-31	9873
2019-06-30	9381
2019-09-30	9355
2019-12-31	8596
2020-03-31	8208
2020-06-30	7939
2020-09-30	7849
2020-12-31	7673
2021-03-31	6610
2021-06-30	6756
2021-09-30	6471
2021-12-31	5860
2022-03-31	6015
2022-06-30	5869
2022-09-30	4849
2022-12-31	5659
2023-03-31	7258
2023-06-30	6031
2023-09-30	6366