Quarter	US dollars
2004-12-31	10406
2005-03-31	12944
2005-06-30	9864
2005-09-30	14462
2005-12-31	10387
2006-03-31	12355
2006-06-30	12665
2006-09-30	11603
2006-12-31	9227
2007-03-31	10334
2007-06-30	10321
2007-09-30	13530
2007-12-31	13825
2008-03-31	18724
2008-06-30	18888
2008-09-30	17486
2008-12-31	7161
2009-03-31	9212
2009-06-30	5110
2009-09-30	6041
2009-12-31	9376
2010-03-31	6250
2010-06-30	5228
2010-09-30	8183
2010-12-31	5581
2011-03-31	6034
2011-06-30	6262
2011-09-30	5872
2011-12-31	6345
2012-03-31	7676
2012-06-30	6185
2012-09-30	7963
2012-12-31	6023
2013-03-31	6358
2013-06-30	6083
2013-09-30	6732
2013-12-31	6537
2014-03-31	7670
2014-06-30	6177
2014-09-30	6172
2014-12-31	5386
2015-03-31	4730
2015-06-30	5106
2015-09-30	5267
2015-12-31	3116
2016-03-31	4244
2016-06-30	3833
2016-09-30	3673
2016-12-31	4659
2017-03-31	5003
2017-06-30	7093
2017-09-30	6331
2017-12-31	5755
2018-03-31	7195
2018-06-30	7039
2018-09-30	7965
2018-12-31	6584
2019-03-31	7378
2019-06-30	6285
2019-09-30	6133
2019-12-31	4395
2020-03-31	4590
2020-06-30	4750
2020-09-30	6992
2020-12-31	7571
2021-03-31	9365
2021-06-30	7982
2021-09-30	8886
2021-12-31	8922
2022-03-31	8363
2022-06-30	8373
2022-09-30	9362
2022-12-31	9586
2023-03-31	7960
2023-06-30	8492
2023-09-30	7644