Quarter	US dollars
2004-12-31	2768
2005-03-31	1803
2005-06-30	2653
2005-09-30	2261
2005-12-31	2460
2006-03-31	2359
2006-06-30	2857
2006-09-30	2526
2006-12-31	2593
2007-03-31	2416
2007-06-30	3756
2007-09-30	3849
2007-12-31	4597
2008-03-31	5704
2008-06-30	5666
2008-09-30	5943
2008-12-31	7871
2009-03-31	8266
2009-06-30	5955
2009-09-30	5719
2009-12-31	4158
2010-03-31	4335
2010-06-30	5458
2010-09-30	5273
2010-12-31	4382
2011-03-31	3539
2011-06-30	4144
2011-09-30	7347
2011-12-31	6384
2012-03-31	5525
2012-06-30	5134
2012-09-30	3688
2012-12-31	3243
2013-03-31	3098
2013-06-30	3000
2013-09-30	2554
2013-12-31	2768
2014-03-31	3036
2014-06-30	4204
2014-09-30	5149
2014-12-31	5759
2015-03-31	6366
2015-06-30	5036
2015-09-30	4988
2015-12-31	4271
2016-03-31	5675
2016-06-30	6698
2016-09-30	5654
2016-12-31	5460
2017-03-31	4629
2017-06-30	4544
2017-09-30	4331
2017-12-31	2102
2018-03-31	1570
2018-06-30	1954
2018-09-30	3546
2018-12-31	3583
2019-03-31	4155
2019-06-30	3627
2019-09-30	4484
2019-12-31	3696
2020-03-31	5228
2020-06-30	4462
2020-09-30	4673
2020-12-31	6104
2021-03-31	5029
2021-06-30	4895
2021-09-30	3552
2021-12-31	3251
2022-03-31	3755
2022-06-30	3884
2022-09-30	5496
2022-12-31	4600
2023-03-31	3272
2023-06-30	3410
2023-09-30	4905