Quarter	US dollars
1999-09-30	2478
1999-12-31	2286
2000-03-31	2429
2000-06-30	2601
2000-09-30	2557
2000-12-31	2437
2001-03-31	2424
2001-06-30	2577
2001-09-30	2511
2001-12-31	2568
2002-03-31	2451
2002-06-30	2809
2002-09-30	2702
2002-12-31	2448
2003-03-31	2434
2003-06-30	2774
2003-09-30	2650
2003-12-31	2670
2004-03-31	2832
2004-06-30	2682
2004-09-30	2651
2004-12-31	2534
2005-03-31	3040
2005-06-30	3006
2005-09-30	2965
2005-12-31	3801
2006-03-31	3955
2006-06-30	3954
2006-09-30	4054
2006-12-31	4329
2007-03-31	4105
2007-06-30	3704
2007-09-30	4319
2007-12-31	5099
2008-03-31	4867
2008-06-30	4157
2008-09-30	4332
2008-12-31	3571
2009-03-31	3812
2009-06-30	3597
2009-09-30	3917
2009-12-31	5826
2010-03-31	4809
2010-06-30	5279
2010-09-30	5390
2010-12-31	6915
2011-03-31	7884
2011-06-30	7611
2011-09-30	8550
2011-12-31	7689
2012-03-31	7668
2012-06-30	8398
2012-09-30	9844
2012-12-31	10031
2013-03-31	10510
2013-06-30	9027
2013-09-30	11673
2013-12-31	9274
2014-03-31	9632
2014-06-30	9779
2014-09-30	10068
2014-12-31	11113
2015-03-31	8901
2015-06-30	8451
2015-09-30	8131
2015-12-31	7436
2016-03-31	7229
2016-06-30	6426
2016-09-30	6329
2016-12-31	6474
2017-03-31	6496
2017-06-30	6712
2017-09-30	7839
2017-12-31	7410
2018-03-31	7025
2018-06-30	6668
2018-09-30	5829
2018-12-31	7006
2019-03-31	8122
2019-06-30	7930
2019-09-30	8248
2019-12-31	7620
2020-03-31	7534
2020-06-30	7146
2020-09-30	7142
2020-12-31	8424
2021-03-31	6804
2021-06-30	7063
2021-09-30	5534
2021-12-31	6383
2022-03-31	6426
2022-06-30	6252
2022-09-30	7283
2022-12-31	7570
2023-03-31	8289
2023-06-30	7888
2023-09-30	8190