Quarter	US dollars
2004-12-31	1019
2005-03-31	1134
2005-06-30	860
2005-09-30	1224
2005-12-31	1122
2006-03-31	1263
2006-06-30	1023
2006-09-30	2550
2006-12-31	1025
2007-03-31	1257
2007-06-30	2520
2007-09-30	3425
2007-12-31	3269
2008-03-31	3160
2008-06-30	3164
2008-09-30	3746
2008-12-31	5568
2009-03-31	6261
2009-06-30	9176
2009-09-30	10571
2009-12-31	9834
2010-03-31	11271
2010-06-30	9013
2010-09-30	6682
2010-12-31	10666
2011-03-31	11160
2011-06-30	11771
2011-09-30	10764
2011-12-31	11001
2012-03-31	11500
2012-06-30	11173
2012-09-30	10742
2012-12-31	6168
2013-03-31	5864
2013-06-30	5771
2013-09-30	7757
2013-12-31	6955
2014-03-31	6753
2014-06-30	7376
2014-09-30	6021
2014-12-31	7926
2015-03-31	7363
2015-06-30	8659
2015-09-30	8866
2015-12-31	7402
2016-03-31	8109
2016-06-30	7355
2016-09-30	6432
2016-12-31	6044
2017-03-31	7637
2017-06-30	9685
2017-09-30	9764
2017-12-31	9554
2018-03-31	7638
2018-06-30	4816
2018-09-30	6869
2018-12-31	7231
2019-03-31	8747
2019-06-30	7400
2019-09-30	10598
2019-12-31	7849
2020-03-31	7119
2020-06-30	7457
2020-09-30	7567
2020-12-31	7855
2021-03-31	11667
2021-06-30	12502
2021-09-30	12176
2021-12-31	12476
2022-03-31	8813
2022-06-30	10468
2022-09-30	11136
2022-12-31	11619
2023-03-31	12880
2023-06-30	9752
2023-09-30	8753