Quarter	US dollars
2004-12-31	2308
2005-03-31	2760
2005-06-30	2778
2005-09-30	2701
2005-12-31	3615
2006-03-31	3639
2006-06-30	3614
2006-09-30	3604
2006-12-31	3955
2007-03-31	3681
2007-06-30	2488
2007-09-30	3066
2007-12-31	3864
2008-03-31	4410
2008-06-30	3682
2008-09-30	3963
2008-12-31	3235
2009-03-31	3736
2009-06-30	3536
2009-09-30	3870
2009-12-31	5775
2010-03-31	4782
2010-06-30	5110
2010-09-30	5514
2010-12-31	6890
2011-03-31	7545
2011-06-30	7134
2011-09-30	7754
2011-12-31	7605
2012-03-31	7946
2012-06-30	8607
2012-09-30	10253
2012-12-31	10283
2013-03-31	10728
2013-06-30	9097
2013-09-30	11530
2013-12-31	8937
2014-03-31	9457
2014-06-30	9896
2014-09-30	10251
2014-12-31	10667
2015-03-31	8454
2015-06-30	8591
2015-09-30	8167
2015-12-31	7709
2016-03-31	7195
2016-06-30	6361
2016-09-30	6950
2016-12-31	7099
2017-03-31	6801
2017-06-30	6166
2017-09-30	7322
2017-12-31	6918
2018-03-31	6708
2018-06-30	6459
2018-09-30	5730
2018-12-31	6825
2019-03-31	8033
2019-06-30	7658
2019-09-30	7892
2019-12-31	7330
2020-03-31	7175
2020-06-30	6896
2020-09-30	6873
2020-12-31	8112
2021-03-31	6452
2021-06-30	6637
2021-09-30	5096
2021-12-31	5914
2022-03-31	5694
2022-06-30	5686
2022-09-30	6748
2022-12-31	6685
2023-03-31	7400
2023-06-30	7116
2023-09-30	7393