Quarter	US dollars
2004-12-31	6065
2005-03-31	9121
2005-06-30	12795
2005-09-30	15293
2005-12-31	15513
2006-03-31	19631
2006-06-30	24027
2006-09-30	27158
2006-12-31	32017
2007-03-31	37720
2007-06-30	41392
2007-09-30	45713
2007-12-31	49344
2008-03-31	58659
2008-06-30	64971
2008-09-30	61586
2008-12-31	49392
2009-03-31	39609
2009-06-30	35370
2009-09-30	32747
2009-12-31	28362
2010-03-31	23639
2010-06-30	20534
2010-09-30	20931
2010-12-31	17712
2011-03-31	18332
2011-06-30	18198
2011-09-30	18182
2011-12-31	16341
2012-03-31	2357
2012-06-30	1981
2012-09-30	1868
2012-12-31	-52
2013-03-31	96
2013-06-30	106
2013-09-30	-6
2013-12-31	102
2014-03-31	8
2014-06-30	72
2014-09-30	8
2014-12-31	136
2015-03-31	196
2015-06-30	167
2015-09-30	271
2015-12-31	218
2016-03-31	528
2016-06-30	548
2016-09-30	156
2016-12-31	193
2017-03-31	228
2017-06-30	136
2017-09-30	160
2017-12-31	227
2018-03-31	59
2018-06-30	61
2018-09-30	80
2018-12-31	112
2019-03-31	78
2019-06-30	8
2019-09-30	-4
2019-12-31	16
2020-03-31	-195
2020-06-30	40
2020-09-30	54
2020-12-31	12
2021-03-31	-12
2021-06-30	35
2021-09-30	53
2021-12-31	39
2022-03-31	126
2022-06-30	160
2022-09-30	252
2022-12-31	251
2023-03-31	277
2023-06-30	384
2023-09-30	303