Quarter	US dollars
2004-12-31	43371
2005-03-31	44791
2005-06-30	48665
2005-09-30	51928
2005-12-31	61185
2006-03-31	63113
2006-06-30	66995
2006-09-30	70526
2006-12-31	87950
2007-03-31	84026
2007-06-30	85099
2007-09-30	92749
2007-12-31	89995
2008-03-31	85411
2008-06-30	83218
2008-09-30	75235
2008-12-31	37291
2009-03-31	42711
2009-06-30	41755
2009-09-30	34596
2009-12-31	34891
2010-03-31	35207
2010-06-30	31090
2010-09-30	33984
2010-12-31	31498
2011-03-31	29138
2011-06-30	27136
2011-09-30	11438
2011-12-31	10957
2012-03-31	7586
2012-06-30	8608
2012-09-30	9822
2012-12-31	6414
2013-03-31	4500
2013-06-30	4632
2013-09-30	5226
2013-12-31	5400
2014-03-31	5167
2014-06-30	4666
2014-09-30	7757
2014-12-31	4804
2015-03-31	3833
2015-06-30	3759
2015-09-30	3770
2015-12-31	5728
2016-03-31	5231
2016-06-30	4352
2016-09-30	3614
2016-12-31	4499
2017-03-31	4075
2017-06-30	4092
2017-09-30	4034
2017-12-31	4248
2018-03-31	6245
2018-06-30	6315
2018-09-30	5982
2018-12-31	7303
2019-03-31	13295
2019-06-30	11375
2019-09-30	9982
2019-12-31	10952
2020-03-31	9187
2020-06-30	10605
2020-09-30	10079
2020-12-31	11307
2021-03-31	8976
2021-06-30	8037
2021-09-30	7012
2021-12-31	10643
2022-03-31	8466
2022-06-30	7804
2022-09-30	7042
2022-12-31	5995
2023-03-31	5274
2023-06-30	5828
2023-09-30	6679