Quarter	US dollars
1999-09-30	935
1999-12-31	842
2000-03-31	845
2000-06-30	995
2000-09-30	1180
2000-12-31	1420
2001-03-31	2673
2001-06-30	2615
2001-09-30	4366
2001-12-31	4041
2002-03-31	3369
2002-06-30	5401
2002-09-30	8525
2002-12-31	8500
2003-03-31	9311
2003-06-30	10906
2003-09-30	9683
2003-12-31	9846
2004-03-31	9555
2004-06-30	8298
2004-09-30	10048
2004-12-31	13530
2005-03-31	12378
2005-06-30	15846
2005-09-30	8706
2005-12-31	7950
2006-03-31	7906
2006-06-30	8955
2006-09-30	9149
2006-12-31	9750
2007-03-31	12741
2007-06-30	19017
2007-09-30	23308
2007-12-31	29599
2008-03-31	47823
2008-06-30	40956
2008-09-30	33928
2008-12-31	44906
2009-03-31	37586
2009-06-30	30667
2009-09-30	32890
2009-12-31	29325
2010-03-31	29538
2010-06-30	29266
2010-09-30	38348
2010-12-31	35316
2011-03-31	25236
2011-06-30	25352
2011-09-30	31820
2011-12-31	29246
2012-03-31	30656
2012-06-30	24367
2012-09-30	15807
2012-12-31	19942
2013-03-31	18714
2013-06-30	17421
2013-09-30	11341
2013-12-31	9913
2014-03-31	8783
2014-06-30	9400
2014-09-30	9348
2014-12-31	10311
2015-03-31	9925
2015-06-30	9195
2015-09-30	8363
2015-12-31	7573
2016-03-31	10171
2016-06-30	9862
2016-09-30	9200
2016-12-31	6703
2017-03-31	6410
2017-06-30	5821
2017-09-30	5946
2017-12-31	6059
2018-03-31	7285
2018-06-30	3858
2018-09-30	5392
2018-12-31	5721
2019-03-31	6211
2019-06-30	6667
2019-09-30	6653
2019-12-31	5869
2020-03-31	7391
2020-06-30	6920
2020-09-30	7287
2020-12-31	7177
2021-03-31	6793
2021-06-30	6144
2021-09-30	5252
2021-12-31	5460
2022-03-31	6144
2022-06-30	5742
2022-09-30	6474
2022-12-31	6370
2023-03-31	5781
2023-06-30	6156
2023-09-30	5089