Quarter	US dollars
1999-09-30	334
1999-12-31	368
2000-03-31	397
2000-06-30	392
2000-09-30	525
2000-12-31	505
2001-03-31	545
2001-06-30	565
2001-09-30	541
2001-12-31	533
2002-03-31	558
2002-06-30	607
2002-09-30	610
2002-12-31	668
2003-03-31	705
2003-06-30	728
2003-09-30	864
2003-12-31	863
2004-03-31	864
2004-06-30	887
2004-09-30	881
2004-12-31	895
2005-03-31	1006
2005-06-30	1101
2005-09-30	1314
2005-12-31	1423
2006-03-31	1433
2006-06-30	1500
2006-09-30	1872
2006-12-31	1468
2007-03-31	1526
2007-06-30	1607
2007-09-30	1591
2007-12-31	1754
2008-03-31	2192
2008-06-30	2434
2008-09-30	2427
2008-12-31	2276
2009-03-31	2267
2009-06-30	2455
2009-09-30	2557
2009-12-31	2522
2010-03-31	2695
2010-06-30	2807
2010-09-30	3175
2010-12-31	3383
2011-03-31	3612
2011-06-30	3775
2011-09-30	3639
2011-12-31	3606
2012-03-31	3545
2012-06-30	3212
2012-09-30	3343
2012-12-31	3504
2013-03-31	3680
2013-06-30	3573
2013-09-30	3668
2013-12-31	4038
2014-03-31	3771
2014-06-30	3871
2014-09-30	4325
2014-12-31	4558
2015-03-31	4426
2015-06-30	4454
2015-09-30	3840
2015-12-31	3838
2016-03-31	3907
2016-06-30	3962
2016-09-30	4084
2016-12-31	4065
2017-03-31	4166
2017-06-30	4596
2017-09-30	4858
2017-12-31	4723
2018-03-31	4656
2018-06-30	4630
2018-09-30	4674
2018-12-31	4470
2019-03-31	4429
2019-06-30	4538
2019-09-30	4427
2019-12-31	4383
2020-03-31	4360
2020-06-30	4104
2020-09-30	4415
2020-12-31	4351
2021-03-31	4215
2021-06-30	4263
2021-09-30	4470
2021-12-31	4026
2022-03-31	3287
2022-06-30	2652
2022-09-30	3019
2022-12-31	2447
2023-03-31	2230
2023-06-30	2234
2023-09-30	2012