Quarter	US dollars
1999-09-30	1962
1999-12-31	8270
2000-03-31	3360
2000-06-30	7692
2000-09-30	8536
2000-12-31	9438
2001-03-31	7446
2001-06-30	8169
2001-09-30	7552
2001-12-31	5702
2002-03-31	4250
2002-06-30	6451
2002-09-30	7585
2002-12-31	4643
2003-03-31	5812
2003-06-30	4198
2003-09-30	5928
2003-12-31	5692
2004-03-31	5516
2004-06-30	4573
2004-09-30	3473
2004-12-31	3842
2005-03-31	3297
2005-06-30	3463
2005-09-30	3622
2005-12-31	4891
2006-03-31	4739
2006-06-30	3744
2006-09-30	4766
2006-12-31	4244
2007-03-31	4222
2007-06-30	2876
2007-09-30	4602
2007-12-31	4248
2008-03-31	6974
2008-06-30	7413
2008-09-30	5782
2008-12-31	2144
2009-03-31	496
2009-06-30	1128
2009-09-30	1190
2009-12-31	2138
2010-03-31	6223
2010-06-30	3038
2010-09-30	4426
2010-12-31	2391
2011-03-31	3750
2011-06-30	4885
2011-09-30	7469
2011-12-31	5872
2012-03-31	6094
2012-06-30	7424
2012-09-30	5123
2012-12-31	4172
2013-03-31	5626
2013-06-30	4586
2013-09-30	4400
2013-12-31	5253
2014-03-31	9772
2014-06-30	2784
2014-09-30	5678
2014-12-31	3897
2015-03-31	8528
2015-06-30	3785
2015-09-30	6752
2015-12-31	7065
2016-03-31	3818
2016-06-30	6543
2016-09-30	10108
2016-12-31	7056
2017-03-31	8824
2017-06-30	6962
2017-09-30	6778
2017-12-31	12557
2018-03-31	15702
2018-06-30	12354
2018-09-30	14756
2018-12-31	5368
2019-03-31	5761
2019-06-30	13351
2019-09-30	4078
2019-12-31	11761
2020-03-31	7882
2020-06-30	6937
2020-09-30	8885
2020-12-31	3838
2021-03-31	14287
2021-06-30	14443
2021-09-30	13510
2021-12-31	10525
2022-03-31	11356
2022-06-30	8722
2022-09-30	8648
2022-12-31	6435
2023-03-31	12218
2023-06-30	11576
2023-09-30	12739
2023-12-31	11641