Quarter	US dollars
2004-12-31	4097
2005-03-31	4193
2005-06-30	3952
2005-09-30	4077
2005-12-31	4345
2006-03-31	4529
2006-06-30	5643
2006-09-30	5915
2006-12-31	6100
2007-03-31	6943
2007-06-30	7891
2007-09-30	8745
2007-12-31	9333
2008-03-31	13471
2008-06-30	15537
2008-09-30	14611
2008-12-31	12974
2009-03-31	12934
2009-06-30	13884
2009-09-30	14862
2009-12-31	16324
2010-03-31	15812
2010-06-30	13609
2010-09-30	16069
2010-12-31	17022
2011-03-31	16920
2011-06-30	17257
2011-09-30	15764
2011-12-31	14821
2012-03-31	14485
2012-06-30	13316
2012-09-30	12769
2012-12-31	12567
2013-03-31	11750
2013-06-30	11274
2013-09-30	11337
2013-12-31	11072
2014-03-31	10649
2014-06-30	9882
2014-09-30	8682
2014-12-31	8083
2015-03-31	6960
2015-06-30	7050
2015-09-30	6921
2015-12-31	6691
2016-03-31	6670
2016-06-30	1284
2016-09-30	1247
2016-12-31	178
2017-03-31	185
2017-06-30	168
2017-09-30	122
2017-12-31	104
2018-03-31	104
2018-06-30	118
2018-09-30	132
2018-12-31	91
2019-03-31	74
2019-06-30	197
2019-09-30	84
2019-12-31	119
2020-03-31	98
2020-06-30	82
2020-09-30	62
2020-12-31	0
2021-03-31	0
2021-06-30	240
2021-09-30	229
2021-12-31	309
2022-03-31	295
2022-06-30	249
2022-09-30	215
2022-12-31	149
2023-03-31	156
2023-06-30	45
2023-09-30	37