Quarter	US dollars
1999-03-31	281
1999-06-30	304
1999-09-30	398
1999-12-31	332
2000-03-31	315
2000-06-30	308
2000-09-30	258
2000-12-31	321
2001-03-31	356
2001-06-30	349
2001-09-30	402
2001-12-31	325
2002-03-31	268
2002-06-30	371
2002-09-30	403
2002-12-31	391
2003-03-31	446
2003-06-30	475
2003-09-30	372
2003-12-31	459
2004-03-31	437
2004-06-30	479
2004-09-30	483
2004-12-31	393
2005-03-31	392
2005-06-30	455
2005-09-30	497
2005-12-31	666
2006-03-31	769
2006-06-30	727
2006-09-30	979
2006-12-31	1379
2007-03-31	1244
2007-06-30	3470
2007-09-30	3101
2007-12-31	2922
2008-03-31	5187
2008-06-30	5481
2008-09-30	3505
2008-12-31	2932
2009-03-31	1908
2009-06-30	1594
2009-09-30	1796
2009-12-31	1831
2010-03-31	2020
2010-06-30	2254
2010-09-30	2540
2010-12-31	2619
2011-03-31	1936
2011-06-30	2369
2011-09-30	2161
2011-12-31	2385
2012-03-31	2739
2012-06-30	2618
2012-09-30	2728
2012-12-31	2750
2013-03-31	2621
2013-06-30	2423
2013-09-30	2305
2013-12-31	2661
2014-03-31	3167
2014-06-30	2555
2014-09-30	2508
2014-12-31	3396
2015-03-31	2913
2015-06-30	3425
2015-09-30	1862
2015-12-31	2534
2016-03-31	2544
2016-06-30	1750
2016-09-30	1976
2016-12-31	1883
2017-03-31	1533
2017-06-30	1698
2017-09-30	1820
2017-12-31	2540
2018-03-31	2482
2018-06-30	2220
2018-09-30	2205
2018-12-31	2714
2019-03-31	2299
2019-06-30	2523
2019-09-30	2583
2019-12-31	1925
2020-03-31	2323
2020-06-30	1511
2020-09-30	1274
2020-12-31	1516
2021-03-31	1234
2021-06-30	994
2021-09-30	1078
2021-12-31	1819
2022-03-31	2176
2022-06-30	2811
2022-09-30	1292
2022-12-31	1303
2023-03-31	1245
2023-06-30	1338
2023-09-30	1085