Quarter	US dollars
2004-12-31	1008
2005-03-31	3614
2005-06-30	3877
2005-09-30	5839
2005-12-31	5345
2006-03-31	6104
2006-06-30	5249
2006-09-30	4467
2006-12-31	5170
2007-03-31	7429
2007-06-30	5490
2007-09-30	5849
2007-12-31	8083
2008-03-31	7590
2008-06-30	9284
2008-09-30	7959
2008-12-31	6658
2009-03-31	5679
2009-06-30	6651
2009-09-30	6047
2009-12-31	5925
2010-03-31	6282
2010-06-30	7307
2010-09-30	8909
2010-12-31	7993
2011-03-31	3118
2011-06-30	3884
2011-09-30	4083
2011-12-31	3415
2012-03-31	3083
2012-06-30	2957
2012-09-30	3963
2012-12-31	4905
2013-03-31	4887
2013-06-30	5055
2013-09-30	4599
2013-12-31	3499
2014-03-31	4967
2014-06-30	3852
2014-09-30	4032
2014-12-31	3562
2015-03-31	3330
2015-06-30	2838
2015-09-30	2640
2015-12-31	2682
2016-03-31	2623
2016-06-30	2225
2016-09-30	2141
2016-12-31	1871
2017-03-31	2032
2017-06-30	2647
2017-09-30	2294
2017-12-31	2572
2018-03-31	2532
2018-06-30	2415
2018-09-30	3026
2018-12-31	1846
2019-03-31	2648
2019-06-30	2467
2019-09-30	2115
2019-12-31	1815
2020-03-31	1533
2020-06-30	1429
2020-09-30	1186
2020-12-31	1062
2021-03-31	1225
2021-06-30	2288
2021-09-30	2017
2021-12-31	1493
2022-03-31	1528
2022-06-30	1277
2022-09-30	1506
2022-12-31	1436
2023-03-31	1655
2023-06-30	1790
2023-09-30	1691