Quarter	US dollars
2004-12-31	2075
2005-03-31	1819
2005-06-30	2146
2005-09-30	4659
2005-12-31	5055
2006-03-31	4029
2006-06-30	5252
2006-09-30	4523
2006-12-31	3920
2007-03-31	3664
2007-06-30	4864
2007-09-30	6338
2007-12-31	8609
2008-03-31	13032
2008-06-30	10776
2008-09-30	9320
2008-12-31	17208
2009-03-31	14735
2009-06-30	13001
2009-09-30	12513
2009-12-31	10692
2010-03-31	13347
2010-06-30	12103
2010-09-30	14087
2010-12-31	14216
2011-03-31	10535
2011-06-30	10884
2011-09-30	13876
2011-12-31	12936
2012-03-31	14172
2012-06-30	12508
2012-09-30	12023
2012-12-31	10585
2013-03-31	9737
2013-06-30	9247
2013-09-30	9255
2013-12-31	9378
2014-03-31	9207
2014-06-30	9289
2014-09-30	9369
2014-12-31	10240
2015-03-31	12274
2015-06-30	9697
2015-09-30	10592
2015-12-31	10464
2016-03-31	10633
2016-06-30	10140
2016-09-30	9765
2016-12-31	8281
2017-03-31	6974
2017-06-30	5957
2017-09-30	5568
2017-12-31	5755
2018-03-31	5177
2018-06-30	3259
2018-09-30	4319
2018-12-31	4451
2019-03-31	4816
2019-06-30	5374
2019-09-30	12722
2019-12-31	10861
2020-03-31	21200
2020-06-30	22339
2020-09-30	21093
2020-12-31	13795
2021-03-31	9213
2021-06-30	7678
2021-09-30	6424
2021-12-31	5879
2022-03-31	5815
2022-06-30	7751
2022-09-30	10392
2022-12-31	9434
2023-03-31	7949
2023-06-30	11119
2023-09-30	10727