Quarter	US dollars
2004-12-31	6076
2005-03-31	7053
2005-06-30	7048
2005-09-30	7889
2005-12-31	7585
2006-03-31	7745
2006-06-30	8147
2006-09-30	9376
2006-12-31	9630
2007-03-31	9453
2007-06-30	10672
2007-09-30	14997
2007-12-31	15549
2008-03-31	18106
2008-06-30	13771
2008-09-30	15789
2008-12-31	8306
2009-06-30	6343
2009-09-30	5644
2009-12-31	6390
2010-03-31	5683
2010-06-30	6467
2010-09-30	6092
2010-12-31	5522
2011-03-31	7101
2011-06-30	6591
2011-09-30	7520
2011-12-31	6923
2012-03-31	8165
2012-06-30	7490
2012-09-30	8511
2012-12-31	7746
2013-03-31	8076
2013-06-30	8574
2013-12-31	6712
2014-03-31	7895
2014-06-30	7241
2014-09-30	7399
2014-12-31	7378
2015-03-31	7208
2015-06-30	7734
2015-09-30	8552
2015-12-31	5680
2016-03-31	5682
2016-06-30	6137
2016-09-30	5077
2016-12-31	5203
2017-03-31	5199
2017-06-30	5354
2017-09-30	5861
2017-12-31	6235
2018-03-31	6812
2018-06-30	6229
2018-09-30	5904
2018-12-31	7931
2019-03-31	7395
2019-06-30	6952
2019-09-30	6908
2019-12-31	7915
2020-03-31	6861
2020-06-30	6982
2020-09-30	6890
2020-12-31	6588
2021-03-31	6588
2021-06-30	5511
2021-09-30	5647
2021-12-31	6109
2022-03-31	6257
2022-06-30	5902
2022-09-30	5562
2022-12-31	6214
2023-03-31	4704
2023-06-30	6032
2023-09-30	5390