Quarter	US dollars
2004-12-31	8795
2005-03-31	10108
2005-06-30	8713
2005-09-30	9711
2005-12-31	12782
2006-03-31	13730
2006-06-30	14888
2006-09-30	13978
2006-12-31	17347
2007-03-31	17726
2007-06-30	17658
2007-09-30	24400
2007-12-31	17900
2008-03-31	19313
2008-06-30	16810
2008-09-30	14128
2008-12-31	11463
2009-03-31	11711
2009-06-30	14920
2009-09-30	13560
2009-12-31	14622
2010-03-31	12124
2010-06-30	17670
2010-09-30	19771
2010-12-31	20474
2011-03-31	25348
2011-06-30	24774
2011-09-30	26709
2011-12-31	25259
2012-03-31	20798
2012-06-30	16597
2012-09-30	16110
2012-12-31	17788
2013-03-31	17378
2013-06-30	17829
2013-09-30	14979
2013-12-31	15255
2014-03-31	18669
2014-06-30	15439
2014-09-30	15729
2014-12-31	14637
2015-03-31	13177
2015-06-30	14216
2015-09-30	15612
2015-12-31	16714
2016-03-31	15691
2016-06-30	16312
2016-09-30	16110
2016-12-31	15419
2017-03-31	15250
2017-06-30	17517
2017-09-30	18311
2017-12-31	19625
2018-03-31	20304
2018-06-30	21324
2018-09-30	21964
2018-12-31	39353
2019-03-31	24430
2019-06-30	23631
2019-09-30	21278
2019-12-31	20104
2020-03-31	19328
2020-06-30	23504
2020-09-30	30621
2020-12-31	31834
2021-03-31	32291
2021-06-30	27916
2021-09-30	29272
2021-12-31	28346
2022-03-31	26606
2022-06-30	24557
2022-09-30	23568
2022-12-31	25319
2023-03-31	24281
2023-06-30	25656
2023-09-30	24810