Quarter	US dollars
1999-03-31	316
1999-06-30	308
1999-09-30	335
1999-12-31	376
2000-03-31	426
2000-06-30	322
2000-09-30	374
2000-12-31	305
2001-03-31	333
2001-06-30	313
2001-09-30	373
2001-12-31	393
2002-03-31	390
2002-06-30	406
2002-09-30	386
2002-12-31	344
2003-03-31	457
2003-06-30	266
2003-09-30	293
2003-12-31	304
2004-03-31	464
2004-06-30	322
2004-09-30	357
2004-12-31	448
2005-03-31	477
2005-06-30	420
2005-09-30	404
2005-12-31	518
2006-03-31	479
2006-06-30	616
2006-09-30	655
2006-12-31	768
2007-03-31	935
2007-06-30	960
2007-09-30	1046
2007-12-31	1360
2008-03-31	1423
2008-06-30	1709
2008-09-30	1241
2008-12-31	1299
2009-03-31	1123
2009-06-30	1218
2009-09-30	653
2009-12-31	563
2010-03-31	709
2010-06-30	736
2010-09-30	2208
2010-12-31	2239
2011-03-31	1533
2011-06-30	1003
2011-09-30	752
2011-12-31	906
2012-03-31	1108
2012-06-30	1123
2012-09-30	806
2012-12-31	1154
2013-03-31	646
2013-06-30	497
2013-09-30	1059
2013-12-31	938
2014-03-31	822
2014-06-30	808
2014-09-30	923
2014-12-31	857
2015-03-31	1413
2015-06-30	1065
2015-09-30	1586
2015-12-31	1690
2016-03-31	2113
2016-06-30	1940
2016-09-30	2128
2016-12-31	2249
2017-03-31	2350
2017-06-30	2673
2017-09-30	3094
2017-12-31	3204
2018-03-31	3031
2018-06-30	2609
2018-09-30	2117
2018-12-31	1856
2019-03-31	1820
2019-06-30	1654
2019-09-30	2210
2019-12-31	2105
2020-03-31	2534
2020-06-30	1716
2020-09-30	2348
2020-12-31	2700
2021-03-31	2506
2021-06-30	2527
2021-09-30	3046
2021-12-31	4558
2022-03-31	3663
2022-06-30	2858
2022-09-30	3579
2022-12-31	4139
2023-03-31	4004
2023-06-30	4685
2023-09-30	4909