Quarter	US dollars
2004-12-31	1192
2005-03-31	1204
2005-06-30	2199
2005-09-30	3485
2005-12-31	4290
2006-03-31	6853
2006-06-30	6704
2006-09-30	6324
2006-12-31	7206
2007-03-31	6870
2007-06-30	8924
2007-09-30	8639
2007-12-31	7655
2008-03-31	7038
2008-06-30	6830
2008-09-30	6471
2008-12-31	5437
2009-03-31	5153
2009-06-30	6139
2009-09-30	6952
2009-12-31	9686
2010-03-31	9087
2010-06-30	8157
2010-09-30	9103
2010-12-31	9603
2011-03-31	5040
2011-06-30	4777
2011-09-30	5231
2011-12-31	4999
2012-03-31	6535
2012-06-30	6191
2012-09-30	5552
2012-12-31	6382
2013-03-31	5778
2013-06-30	5110
2013-09-30	4631
2013-12-31	5041
2014-03-31	7555
2014-06-30	7497
2014-09-30	7051
2014-12-31	10384
2015-03-31	11107
2015-06-30	11512
2015-09-30	11213
2015-12-31	11150
2016-03-31	9159
2016-06-30	9149
2016-09-30	9187
2016-12-31	9340
2017-03-31	10601
2017-06-30	1370
2017-09-30	1300
2017-12-31	1519
2018-03-31	1733
2018-06-30	1565
2018-09-30	1399
2018-12-31	1050
2019-03-31	853
2019-06-30	818
2019-09-30	907
2019-12-31	1185
2020-03-31	1055
2020-06-30	698
2020-09-30	691
2020-12-31	732
2021-03-31	928
2021-06-30	1260
2021-09-30	1032
2021-12-31	1164
2022-03-31	1237
2022-06-30	1146
2022-09-30	1102
2022-12-31	906
2023-03-31	1111
2023-06-30	917
2023-09-30	609