Quarter	US dollars
2004-12-31	4153
2005-03-31	4596
2005-06-30	3960
2005-09-30	4360
2005-12-31	4451
2006-03-31	4870
2006-06-30	5530
2006-09-30	5724
2006-12-31	5681
2007-03-31	6011
2007-06-30	6477
2007-09-30	7329
2007-12-31	7149
2008-03-31	7988
2008-06-30	6758
2008-09-30	7339
2008-12-31	7749
2009-03-31	7254
2009-06-30	6683
2009-09-30	6962
2009-12-31	8460
2010-03-31	8703
2010-06-30	9945
2010-09-30	9595
2010-12-31	5993
2011-03-31	7903
2011-06-30	6507
2011-09-30	6983
2011-12-31	8420
2012-03-31	8069
2012-06-30	8441
2012-09-30	8908
2012-12-31	7187
2013-03-31	7478
2013-06-30	11202
2013-09-30	8706
2013-12-31	9203
2014-03-31	9122
2014-06-30	9388
2014-09-30	8370
2014-12-31	10329
2015-03-31	8482
2015-06-30	9212
2015-09-30	8931
2015-12-31	6297
2016-03-31	8056
2016-06-30	10014
2016-09-30	9768
2016-12-31	11448
2017-03-31	14020
2017-06-30	10082
2017-09-30	8279
2017-12-31	7037
2018-03-31	6211
2018-06-30	7540
2018-09-30	9225
2018-12-31	8696
2019-03-31	7576
2019-06-30	10232
2019-09-30	8028
2019-12-31	8131
2020-03-31	8238
2020-06-30	8294
2020-09-30	7598
2020-12-31	9523
2021-03-31	12469
2021-06-30	9205
2021-09-30	8763
2021-12-31	8028
2022-03-31	10002
2022-06-30	8154
2022-09-30	6918
2022-12-31	7934
2023-03-31	6620
2023-06-30	7149
2023-09-30	6948