Quarter	US dollars
2004-12-31	2486
2005-03-31	2947
2005-06-30	3375
2005-09-30	3720
2005-12-31	4175
2006-03-31	4350
2006-06-30	4934
2006-09-30	5020
2006-12-31	5401
2007-03-31	5652
2007-06-30	6794
2007-09-30	7434
2007-12-31	8953
2008-03-31	8451
2008-06-30	9232
2008-09-30	8723
2008-12-31	7808
2009-03-31	7701
2009-06-30	8036
2009-09-30	8428
2009-12-31	8413
2010-03-31	9431
2010-06-30	10146
2010-09-30	11418
2010-12-31	12286
2011-03-31	13850
2011-06-30	13304
2011-09-30	10835
2011-12-31	11931
2012-03-31	13204
2012-06-30	14419
2012-09-30	14463
2012-12-31	13786
2013-03-31	14682
2013-06-30	17037
2013-09-30	15903
2013-12-31	14946
2014-03-31	14877
2014-06-30	15738
2014-09-30	13257
2014-12-31	14172
2015-03-31	11221
2015-06-30	9640
2015-09-30	7383
2015-12-31	7942
2016-03-31	6996
2016-06-30	6849
2016-09-30	6736
2016-12-31	5541
2017-03-31	6455
2017-06-30	6346
2017-09-30	5666
2017-12-31	5601
2018-03-31	6110
2018-06-30	5269
2018-09-30	4901
2018-12-31	4370
2019-03-31	4623
2019-06-30	5056
2019-09-30	5112
2019-12-31	4637
2020-03-31	3893
2020-06-30	4645
2020-09-30	5385
2020-12-31	5566
2021-03-31	5754
2021-06-30	4201
2021-09-30	3883
2021-12-31	3838
2022-03-31	4143
2022-06-30	4029
2022-09-30	3562
2022-12-31	3610
2023-03-31	5047
2023-06-30	4700
2023-09-30	4835