Quarter	US dollars
2004-12-31	8985
2005-03-31	12367
2005-06-30	9552
2005-09-30	10701
2005-12-31	9464
2006-03-31	9372
2006-06-30	10762
2006-09-30	11435
2006-12-31	10930
2007-03-31	12597
2007-06-30	13298
2007-09-30	13162
2007-12-31	12507
2008-03-31	10862
2008-06-30	10555
2008-09-30	10766
2008-12-31	5302
2009-03-31	5393
2009-06-30	4280
2009-09-30	6207
2009-12-31	4596
2010-03-31	5889
2010-06-30	4545
2010-09-30	7273
2010-12-31	6852
2011-03-31	5941
2011-06-30	4165
2011-09-30	6520
2011-12-31	4644
2012-03-31	7139
2012-06-30	5802
2012-09-30	6487
2012-12-31	4546
2013-03-31	3936
2013-06-30	5950
2013-09-30	6617
2013-12-31	3401
2014-03-31	2871
2014-06-30	4606
2014-09-30	2844
2014-12-31	2006
2015-03-31	3066
2015-06-30	1886
2015-09-30	2366
2015-12-31	2580
2016-03-31	2453
2016-06-30	2196
2016-09-30	1385
2016-12-31	1063
2017-03-31	938
2017-06-30	1040
2017-09-30	1001
2017-12-31	1442
2018-03-31	2186
2018-06-30	2858
2018-09-30	2385
2018-12-31	884
2019-03-31	2769
2019-06-30	2274
2019-09-30	2352
2019-12-31	1987
2020-03-31	2438
2020-06-30	2436
2020-09-30	2886
2020-12-31	3377
2021-03-31	3311
2021-06-30	2855
2021-09-30	2880
2021-12-31	3247
2022-03-31	4343
2022-06-30	3240
2022-09-30	3305
2022-12-31	3408
2023-03-31	5052
2023-06-30	5002
2023-09-30	4798