Quarter	US dollars
2004-12-31	2609
2005-03-31	2781
2005-06-30	2764
2005-09-30	3548
2005-12-31	3737
2006-03-31	3575
2006-06-30	4818
2006-09-30	3916
2006-12-31	3652
2007-03-31	4684
2007-06-30	4932
2007-09-30	5780
2007-12-31	6066
2008-03-31	6483
2008-06-30	8305
2008-09-30	8862
2008-12-31	8509
2009-03-31	7746
2009-06-30	6977
2009-09-30	7960
2009-12-31	8229
2010-03-31	8161
2010-06-30	8863
2010-09-30	8881
2010-12-31	9419
2011-03-31	9118
2011-06-30	9017
2011-09-30	8807
2011-12-31	8054
2012-03-31	9996
2012-06-30	9443
2012-09-30	9471
2012-12-31	7963
2013-03-31	11538
2013-06-30	11680
2013-09-30	10934
2013-12-31	9318
2014-03-31	9534
2014-06-30	9277
2014-09-30	9413
2014-12-31	8915
2015-03-31	9787
2015-06-30	9827
2015-09-30	9735
2015-12-31	9497
2016-03-31	9257
2016-06-30	9493
2016-09-30	9247
2016-12-31	9092
2017-03-31	9563
2017-06-30	6886
2017-09-30	6534
2017-12-31	6284
2018-03-31	6284
2018-06-30	5952
2018-09-30	6286
2018-12-31	5686
2019-03-31	6596
2019-06-30	6691
2019-09-30	6916
2019-12-31	7205
2020-03-31	6272
2020-06-30	6024
2020-09-30	6059
2020-12-31	7234
2021-03-31	7022
2021-06-30	7124
2021-09-30	7080
2021-12-31	7048
2022-03-31	6785
2022-06-30	7611
2022-09-30	7383
2022-12-31	7089
2023-03-31	7248
2023-06-30	7379
2023-09-30	7791