Quarter	US dollars
2004-12-31	6295
2005-03-31	7023
2005-06-30	5928
2005-09-30	6350
2005-12-31	5212
2006-03-31	5219
2006-06-30	5713
2006-09-30	7271
2006-12-31	6360
2007-03-31	7688
2007-06-30	6954
2007-09-30	9172
2007-12-31	8139
2008-03-31	9713
2008-06-30	12458
2008-09-30	14677
2008-12-31	10079
2009-03-31	11936
2009-06-30	13441
2009-09-30	14723
2009-12-31	13805
2010-03-31	13464
2010-06-30	12357
2010-09-30	14887
2010-12-31	15356
2011-03-31	16286
2011-06-30	15748
2011-09-30	15146
2011-12-31	15014
2012-03-31	16094
2012-06-30	16022
2012-09-30	20635
2012-12-31	18440
2013-03-31	19456
2013-06-30	18114
2013-09-30	20685
2013-12-31	19673
2014-03-31	20826
2014-06-30	23428
2014-09-30	23927
2014-12-31	19597
2015-03-31	20905
2015-06-30	20666
2015-09-30	21725
2015-12-31	16243
2016-03-31	16871
2016-06-30	18533
2016-09-30	22030
2016-12-31	21306
2017-03-31	21019
2017-06-30	22393
2017-09-30	23623
2017-12-31	23679
2018-03-31	26100
2018-06-30	28063
2018-09-30	28201
2018-12-31	28632
2019-03-31	32442
2019-06-30	32408
2019-09-30	29488
2019-12-31	29342
2020-03-31	30823
2020-06-30	30376
2020-09-30	32774
2020-12-31	35214
2021-03-31	35751
2021-06-30	36133
2021-09-30	37922
2021-12-31	38923
2022-03-31	41721
2022-06-30	36984
2022-09-30	34039
2022-12-31	35464
2023-03-31	36603
2023-06-30	36529
2023-09-30	42087