Quarter	US dollars
2004-12-31	4216
2005-03-31	4717
2005-06-30	4155
2005-09-30	4528
2005-12-31	4599
2006-03-31	4563
2006-06-30	4857
2006-09-30	5644
2006-12-31	5384
2007-03-31	5866
2007-06-30	5598
2007-09-30	8115
2007-12-31	6144
2008-03-31	6817
2008-06-30	6947
2008-09-30	5525
2008-12-31	12984
2009-03-31	12019
2009-06-30	11852
2009-09-30	11798
2009-12-31	10036
2010-03-31	9391
2010-06-30	10060
2010-09-30	11186
2010-12-31	8889
2011-03-31	8879
2011-06-30	7275
2011-09-30	6068
2011-12-31	5462
2012-03-31	5723
2012-06-30	5601
2012-09-30	5496
2012-12-31	4855
2013-03-31	4906
2013-06-30	5918
2013-09-30	5684
2013-12-31	5084
2014-03-31	4702
2014-06-30	4789
2014-09-30	3833
2014-12-31	3841
2015-03-31	4402
2015-06-30	3827
2015-09-30	3523
2015-12-31	5390
2016-03-31	3968
2016-06-30	3583
2016-09-30	3101
2016-12-31	4475
2017-03-31	4110
2017-06-30	3596
2017-09-30	3591
2017-12-31	3455
2018-03-31	3211
2018-06-30	3582
2018-09-30	2333
2018-12-31	2868
2019-03-31	2163
2019-06-30	2189
2019-09-30	2843
2019-12-31	3017
2020-03-31	4110
2020-06-30	2624
2020-09-30	2644
2020-12-31	3072
2021-03-31	2352
2021-06-30	2746
2021-09-30	2334
2021-12-31	2394
2022-03-31	2009
2022-06-30	2174
2022-09-30	2097
2022-12-31	2236
2023-03-31	2078
2023-06-30	2750
2023-09-30	2629