Quarter	US dollars
1999-03-31	358
1999-06-30	348
1999-09-30	350
1999-12-31	372
2000-03-31	381
2000-06-30	423
2000-09-30	412
2000-12-31	411
2001-03-31	403
2001-06-30	355
2001-09-30	372
2001-12-31	387
2002-03-31	535
2002-06-30	544
2002-09-30	652
2002-12-31	679
2003-03-31	703
2003-06-30	627
2003-09-30	791
2003-12-31	965
2004-03-31	905
2004-06-30	1073
2004-09-30	981
2004-12-31	1013
2005-03-31	1060
2005-06-30	1365
2005-09-30	2106
2005-12-31	2416
2006-03-31	3681
2006-06-30	2988
2006-09-30	2995
2006-12-31	4055
2007-03-31	4182
2007-06-30	4954
2007-09-30	3525
2007-12-31	4633
2008-03-31	4762
2008-06-30	4489
2008-09-30	3233
2008-12-31	2071
2009-03-31	2185
2009-06-30	2554
2009-09-30	2642
2009-12-31	2832
2010-03-31	3153
2010-06-30	3214
2010-09-30	4060
2010-12-31	2818
2011-03-31	2230
2011-06-30	1949
2011-09-30	1829
2011-12-31	1368
2012-03-31	1244
2012-06-30	1404
2012-09-30	1816
2012-12-31	1298
2013-03-31	1412
2013-06-30	1428
2013-09-30	1501
2013-12-31	1522
2014-03-31	1411
2014-06-30	1394
2014-09-30	1448
2014-12-31	1274
2015-03-31	1458
2015-06-30	1492
2015-09-30	1549
2015-12-31	1289
2016-03-31	1405
2016-06-30	2024
2016-09-30	1670
2016-12-31	1657
2017-03-31	2504
2017-06-30	3888
2017-09-30	5241
2017-12-31	5579
2018-03-31	5897
2018-06-30	4690
2018-09-30	3579
2018-12-31	3534
2019-03-31	5157
2019-06-30	5270
2019-09-30	6367
2019-12-31	8849
2020-03-31	6557
2020-06-30	6056
2020-09-30	9115
2020-12-31	9918
2021-03-31	10534
2021-06-30	11629
2021-09-30	11410
2021-12-31	9403
2022-03-31	5749
2022-06-30	4967
2022-09-30	4532
2022-12-31	5406
2023-03-31	5589
2023-06-30	5475
2023-09-30	5907