Quarter	US dollars
1999-03-31	239
1999-06-30	286
1999-09-30	183
1999-12-31	169
2000-03-31	85
2000-06-30	61
2000-09-30	36
2000-12-31	83
2001-03-31	48
2001-06-30	39
2001-09-30	107
2001-12-31	107
2002-03-31	134
2002-06-30	171
2002-09-30	210
2002-12-31	268
2003-03-31	237
2003-06-30	200
2003-09-30	243
2003-12-31	518
2004-03-31	563
2004-06-30	616
2004-09-30	445
2004-12-31	434
2005-03-31	507
2005-06-30	469
2005-09-30	398
2005-12-31	458
2006-03-31	610
2006-06-30	583
2006-09-30	439
2006-12-31	616
2007-03-31	578
2007-06-30	678
2007-09-30	559
2007-12-31	721
2008-03-31	735
2008-06-30	1013
2008-09-30	1557
2008-12-31	924
2009-03-31	677
2009-06-30	404
2009-09-30	775
2009-12-31	394
2010-03-31	336
2010-06-30	343
2010-09-30	490
2010-12-31	736
2011-03-31	1007
2011-06-30	1307
2011-09-30	1710
2011-12-31	1630
2012-03-31	1832
2012-06-30	2018
2012-09-30	2162
2012-12-31	929
2013-03-31	531
2013-06-30	394
2013-09-30	542
2013-12-31	688
2014-03-31	911
2014-06-30	1073
2014-09-30	958
2014-12-31	749
2015-03-31	750
2015-06-30	890
2015-09-30	805
2015-12-31	877
2016-03-31	865
2016-06-30	600
2016-09-30	568
2016-12-31	569
2017-03-31	622
2017-06-30	487
2017-09-30	438
2017-12-31	447
2018-03-31	353
2018-06-30	327
2018-09-30	333
2018-12-31	892
2019-03-31	1048
2019-06-30	1155
2019-09-30	1285
2019-12-31	1820
2020-03-31	1886
2020-06-30	1652
2020-09-30	1557
2020-12-31	738
2021-03-31	296
2021-06-30	427
2021-09-30	526
2021-12-31	561
2022-03-31	1007
2022-06-30	1624
2022-09-30	1152
2022-12-31	1802
2023-03-31	2464
2023-06-30	1294
2023-09-30	1434