Quarter	US dollars
2004-12-31	866
2005-03-31	1115
2005-06-30	1174
2005-09-30	1518
2005-12-31	1576
2006-03-31	1783
2006-06-30	1365
2006-09-30	1388
2006-12-31	1628
2007-03-31	1930
2007-06-30	2231
2007-09-30	3246
2007-12-31	2417
2008-03-31	3804
2008-06-30	3863
2008-09-30	4113
2008-12-31	4205
2009-03-31	4236
2009-06-30	4721
2009-09-30	4958
2009-12-31	3727
2010-03-31	3680
2010-06-30	3681
2010-09-30	4421
2010-12-31	9384
2011-03-31	9531
2011-06-30	10965
2011-09-30	26734
2011-12-31	25620
2012-03-31	29819
2012-06-30	18975
2012-09-30	31004
2012-12-31	43215
2013-03-31	59751
2013-06-30	59095
2013-09-30	51967
2013-12-31	42014
2014-03-31	51781
2014-06-30	47774
2014-09-30	39170
2014-12-31	32112
2015-03-31	27137
2015-06-30	25484
2015-09-30	22601
2015-12-31	21041
2016-03-31	21942
2016-06-30	19566
2016-09-30	19379
2016-12-31	18393
2017-03-31	18184
2017-06-30	15627
2017-09-30	15628
2017-12-31	15011
2018-03-31	13089
2018-06-30	11764
2018-09-30	10236
2018-12-31	12806
2019-03-31	13581
2019-06-30	13055
2019-09-30	12395
2019-12-31	12573
2020-03-31	11553
2020-06-30	11831
2020-09-30	12765
2020-12-31	13836
2021-03-31	14738
2021-06-30	13364
2021-09-30	13565
2021-12-31	13612
2022-03-31	14135
2022-06-30	12454
2022-09-30	12506
2022-12-31	12784
2023-03-31	13155
2023-06-30	10706
2023-09-30	10425