Quarter	US dollars
2004-12-31	6050
2005-03-31	5021
2005-06-30	6227
2005-09-30	5697
2005-12-31	5646
2006-03-31	5793
2006-06-30	7110
2006-09-30	5126
2006-12-31	7198
2007-03-31	6058
2007-06-30	9691
2007-09-30	11911
2007-12-31	11101
2008-03-31	14767
2008-06-30	15650
2008-09-30	15586
2008-12-31	22442
2009-03-31	19176
2009-06-30	19470
2009-09-30	20210
2009-12-31	16700
2010-03-31	17503
2010-06-30	20475
2010-09-30	25109
2010-12-31	24594
2011-03-31	25255
2011-06-30	26396
2011-09-30	25992
2011-12-31	26264
2012-03-31	24072
2012-06-30	25156
2012-09-30	25142
2012-12-31	17406
2013-03-31	16148
2013-06-30	14151
2013-09-30	12226
2013-12-31	12092
2014-03-31	11541
2014-06-30	11115
2014-09-30	14626
2014-12-31	15059
2015-03-31	17277
2015-06-30	12980
2015-09-30	14016
2015-12-31	11879
2016-03-31	12159
2016-06-30	11570
2016-09-30	9244
2016-12-31	9710
2017-03-31	6898
2017-06-30	6656
2017-09-30	7110
2017-12-31	5862
2018-03-31	5904
2018-06-30	5367
2018-09-30	6475
2018-12-31	6425
2019-03-31	5161
2019-06-30	5693
2019-09-30	7158
2019-12-31	6135
2020-03-31	9764
2020-06-30	7524
2020-09-30	5752
2020-12-31	7290
2021-03-31	5723
2021-06-30	5331
2021-09-30	4327
2021-12-31	3807
2022-03-31	4280
2022-06-30	6098
2022-09-30	7848
2022-12-31	6017
2023-03-31	5340
2023-06-30	5504
2023-09-30	5847