Quarter	US dollars
2004-12-31	1620
2005-03-31	1469
2005-06-30	1391
2005-09-30	1907
2005-12-31	1711
2006-03-31	1587
2006-06-30	1925
2006-09-30	1717
2006-12-31	2053
2007-03-31	2297
2007-06-30	2817
2007-09-30	3193
2007-12-31	3201
2008-03-31	3160
2008-06-30	3391
2008-09-30	3933
2008-12-31	3383
2009-03-31	3290
2009-06-30	3050
2009-09-30	3237
2009-12-31	3147
2010-03-31	3974
2010-06-30	4674
2010-09-30	4745
2010-12-31	5271
2011-03-31	4118
2011-06-30	3805
2011-09-30	7350
2011-12-31	4270
2012-03-31	4229
2012-06-30	4190
2012-09-30	4197
2012-12-31	3843
2013-03-31	3806
2013-06-30	3865
2013-09-30	4102
2013-12-31	4367
2014-03-31	5375
2014-06-30	5155
2014-09-30	5603
2014-12-31	5544
2015-03-31	5312
2015-06-30	5540
2015-09-30	5418
2015-12-31	7573
2016-03-31	7490
2016-06-30	11816
2016-09-30	12506
2016-12-31	12233
2017-03-31	11958
2017-06-30	11766
2017-09-30	11724
2017-12-31	13815
2018-03-31	11156
2018-06-30	10664
2018-09-30	9229
2018-12-31	9607
2019-03-31	8889
2019-06-30	9538
2019-09-30	7516
2019-12-31	8059
2020-03-31	9833
2020-06-30	8394
2020-09-30	7602
2020-12-31	7966
2021-03-31	6876
2021-06-30	7524
2021-09-30	7738
2021-12-31	7563
2022-03-31	7996
2022-06-30	8918
2022-09-30	9026
2022-12-31	11954
2023-03-31	11258
2023-06-30	12441
2023-09-30	11753