Quarter	US dollars
2004-12-31	11264
2005-03-31	12029
2005-06-30	7120
2005-09-30	9483
2005-12-31	12904
2006-03-31	10889
2006-06-30	17490
2006-09-30	20817
2006-12-31	24825
2007-03-31	21555
2007-06-30	23463
2007-09-30	25298
2007-12-31	20674
2008-03-31	40621
2008-06-30	50608
2008-09-30	47438
2008-12-31	52194
2009-03-31	8808
2009-06-30	8236
2009-09-30	9901
2009-12-31	16148
2010-03-31	18247
2010-06-30	11666
2010-09-30	15506
2010-12-31	11456
2011-03-31	14934
2011-06-30	11978
2011-09-30	13010
2011-12-31	13946
2012-03-31	20211
2012-06-30	9928
2012-09-30	12091
2012-12-31	9662
2013-03-31	11041
2013-06-30	9874
2013-09-30	9606
2013-12-31	8145
2014-03-31	7916
2014-06-30	8550
2014-09-30	7868
2014-12-31	6114
2015-03-31	11901
2015-06-30	7427
2015-09-30	8711
2015-12-31	9183
2016-03-31	9328
2016-06-30	8934
2016-09-30	7762
2016-12-31	6848
2017-03-31	4751
2017-06-30	4974
2017-09-30	4842
2017-12-31	5282
2018-03-31	5251
2018-06-30	4230
2018-09-30	5911
2018-12-31	7291
2019-03-31	6875
2019-06-30	7900
2019-09-30	15090
2019-12-31	8070
2020-03-31	12312
2020-06-30	6487
2020-09-30	7292
2020-12-31	7668
2021-03-31	8095
2021-06-30	8126
2021-09-30	7234
2021-12-31	6635
2022-03-31	9437
2022-06-30	8372
2022-09-30	9126
2022-12-31	11274
2023-03-31	13342
2023-06-30	13106
2023-09-30	13070