Quarter	US dollars
2004-12-31	4320
2005-03-31	5002
2005-06-30	5229
2005-09-30	6900
2005-12-31	5863
2006-03-31	7245
2006-06-30	6647
2006-09-30	7626
2006-12-31	7147
2007-03-31	8332
2007-06-30	8196
2007-09-30	13182
2007-12-31	7008
2008-03-31	13970
2008-06-30	6734
2008-09-30	11407
2008-12-31	5960
2009-03-31	6038
2009-06-30	5828
2009-09-30	6077
2009-12-31	6256
2010-03-31	6469
2010-06-30	6745
2010-09-30	6215
2010-12-31	5260
2011-03-31	5259
2011-06-30	5759
2011-09-30	5439
2011-12-31	4774
2012-03-31	4344
2012-06-30	4674
2012-09-30	4644
2012-12-31	4537
2013-03-31	4169
2013-06-30	4485
2013-09-30	4346
2013-12-31	4051
2014-03-31	4443
2014-06-30	4026
2014-09-30	4115
2014-12-31	4228
2015-03-31	3994
2015-06-30	4193
2015-09-30	3782
2015-12-31	3564
2016-03-31	3464
2016-06-30	3336
2016-09-30	3153
2016-12-31	3040
2017-03-31	2818
2017-06-30	2912
2017-09-30	2730
2017-12-31	2933
2018-03-31	2953
2018-06-30	3090
2018-09-30	3113
2018-12-31	3428
2019-03-31	3342
2019-06-30	3057
2019-09-30	3054
2019-12-31	2900
2020-03-31	3174
2020-06-30	3117
2020-09-30	3371
2020-12-31	3294
2021-03-31	3005
2021-06-30	2916
2021-09-30	3181
2021-12-31	3218
2022-03-31	3018
2022-06-30	3509
2022-09-30	3081
2022-12-31	3619
2023-03-31	3536
2023-06-30	3625
2023-09-30	3482