Quarter	US dollars
2004-12-31	24108
2005-03-31	24643
2005-06-30	27248
2005-09-30	26700
2005-12-31	23730
2006-03-31	26541
2006-06-30	27436
2006-09-30	27405
2006-12-31	22578
2007-03-31	25226
2007-06-30	16242
2007-09-30	19431
2007-12-31	19782
2008-03-31	17893
2008-06-30	19917
2008-09-30	17165
2008-12-31	13953
2009-03-31	14107
2009-06-30	16644
2009-09-30	15200
2009-12-31	40231
2010-03-31	40020
2010-06-30	55267
2010-09-30	67687
2010-12-31	69345
2011-03-31	61820
2011-06-30	49449
2011-09-30	38592
2011-12-31	39245
2012-03-31	36231
2012-06-30	34435
2012-09-30	32623
2012-12-31	9331
2013-03-31	22099
2013-06-30	29695
2013-09-30	31256
2013-12-31	33314
2014-03-31	24858
2014-06-30	23799
2014-09-30	22447
2014-12-31	28483
2015-03-31	41165
2015-06-30	39206
2015-09-30	43007
2015-12-31	39426
2016-03-31	39823
2016-06-30	39090
2016-09-30	31881
2016-12-31	32404
2017-03-31	31041
2017-06-30	36338
2017-09-30	37153
2017-12-31	33779
2018-03-31	30763
2018-06-30	32442
2018-09-30	31561
2018-12-31	32260
2019-03-31	29316
2019-06-30	33088
2019-09-30	35452
2019-12-31	35354
2020-03-31	35149
2020-06-30	34289
2020-09-30	29080
2020-12-31	25167
2021-03-31	19763
2021-06-30	20952
2021-09-30	24387
2021-12-31	27118
2022-03-31	26169
2022-06-30	24734
2022-09-30	25938
2022-12-31	23673
2023-03-31	27774
2023-06-30	38665
2023-09-30	38152