Quarter	US dollars
2004-12-31	6837
2005-03-31	7514
2005-06-30	8319
2005-09-30	9725
2005-12-31	10200
2006-03-31	11656
2006-06-30	11255
2006-09-30	11917
2006-12-31	14122
2007-03-31	15169
2007-06-30	19087
2007-09-30	21048
2007-12-31	23098
2008-03-31	25486
2008-06-30	27887
2008-09-30	26514
2008-12-31	22573
2009-03-31	21069
2009-06-30	21733
2009-09-30	22872
2009-12-31	21598
2010-03-31	21796
2010-06-30	29547
2010-09-30	31772
2010-12-31	30117
2011-03-31	32199
2011-06-30	32868
2011-09-30	30502
2011-12-31	29898
2012-03-31	31433
2012-06-30	31149
2012-09-30	31602
2012-12-31	28983
2013-03-31	28489
2013-06-30	28071
2013-09-30	28531
2013-12-31	31197
2014-03-31	29376
2014-06-30	30397
2014-09-30	27831
2014-12-31	25864
2015-03-31	23819
2015-06-30	23345
2015-09-30	20877
2015-12-31	19715
2016-03-31	19663
2016-06-30	18149
2016-09-30	16657
2016-12-31	14804
2017-03-31	15135
2017-06-30	15036
2017-09-30	15776
2017-12-31	14634
2018-03-31	15191
2018-06-30	13765
2018-09-30	12470
2018-12-31	11755
2019-03-31	11224
2019-06-30	11482
2019-09-30	11189
2019-12-31	10682
2020-03-31	10298
2020-06-30	9759
2020-09-30	10335
2020-12-31	10563
2021-03-31	9725
2021-06-30	8609
2021-09-30	8123
2021-12-31	7898
2022-03-31	7734
2022-06-30	6802
2022-09-30	6478
2022-12-31	7216
2023-03-31	7311
2023-06-30	7162
2023-09-30	6826