Quarter	US dollars
1999-09-30	272
1999-12-31	261
2000-03-31	330
2000-06-30	383
2000-09-30	377
2000-12-31	419
2001-03-31	399
2001-06-30	436
2001-09-30	444
2001-12-31	381
2002-03-31	336
2002-06-30	272
2002-09-30	244
2002-12-31	193
2003-03-31	193
2003-06-30	168
2003-09-30	196
2003-12-31	215
2004-03-31	210
2004-06-30	354
2004-09-30	358
2004-12-31	384
2005-03-31	520
2005-06-30	622
2005-09-30	301
2005-12-31	278
2006-03-31	316
2006-06-30	390
2006-09-30	501
2006-12-31	376
2007-03-31	379
2007-06-30	399
2007-09-30	428
2007-12-31	452
2008-03-31	558
2008-06-30	689
2008-09-30	672
2008-12-31	633
2009-03-31	599
2009-06-30	685
2009-09-30	665
2009-12-31	667
2010-03-31	623
2010-06-30	298
2010-09-30	361
2010-12-31	327
2011-03-31	394
2011-06-30	446
2011-09-30	633
2011-12-31	591
2012-03-31	577
2012-06-30	594
2012-09-30	1252
2012-12-31	1352
2013-03-31	1963
2013-06-30	1885
2013-09-30	1742
2013-12-31	1354
2014-03-31	1346
2014-06-30	1409
2014-09-30	1423
2014-12-31	1487
2015-03-31	1467
2015-06-30	1452
2015-09-30	1369
2015-12-31	1350
2016-03-31	1323
2016-06-30	1261
2016-09-30	1260
2016-12-31	1396
2017-03-31	1511
2017-06-30	1341
2017-09-30	1284
2017-12-31	1247
2018-03-31	1318
2018-06-30	1199
2018-09-30	1205
2018-12-31	1196
2019-03-31	1366
2019-06-30	1179
2019-09-30	1204
2019-12-31	1258
2020-03-31	1337
2020-06-30	1359
2020-09-30	1428
2020-12-31	1332
2021-03-31	1443
2021-06-30	1425
2021-09-30	1386
2021-12-31	1415
2022-03-31	1483
2022-06-30	1410
2022-09-30	1434
2022-12-31	1415
2023-03-31	1445
2023-06-30	1564
2023-09-30	1599