Quarter	US dollars
1999-03-31	47
1999-06-30	48
1999-09-30	88
1999-12-31	70
2000-03-31	47
2000-06-30	19
2000-09-30	29
2000-12-31	28
2001-03-31	37
2001-06-30	77
2001-09-30	67
2001-12-31	76
2002-03-31	40
2002-06-30	49
2002-09-30	59
2002-12-31	72
2003-03-31	64
2003-06-30	70
2003-09-30	84
2003-12-31	92
2004-03-31	94
2004-06-30	77
2004-09-30	95
2004-12-31	116
2005-03-31	94
2005-06-30	87
2005-09-30	97
2005-12-31	104
2006-03-31	139
2006-06-30	130
2006-09-30	110
2006-12-31	89
2007-03-31	67
2007-06-30	126
2007-09-30	161
2007-12-31	172
2008-03-31	220
2008-06-30	343
2008-09-30	435
2008-12-31	436
2009-03-31	383
2009-06-30	460
2009-09-30	408
2009-12-31	397
2010-03-31	554
2010-06-30	493
2010-09-30	496
2010-12-31	460
2011-03-31	457
2011-06-30	436
2011-09-30	502
2011-12-31	502
2012-03-31	469
2012-06-30	525
2012-09-30	478
2012-12-31	480
2013-03-31	501
2013-06-30	419
2013-09-30	454
2013-12-31	483
2014-03-31	428
2014-06-30	794
2014-09-30	718
2014-12-31	784
2015-03-31	798
2015-06-30	803
2015-09-30	797
2015-12-31	759
2016-03-31	723
2016-06-30	759
2016-09-30	774
2016-12-31	981
2017-03-31	924
2017-06-30	1011
2017-09-30	993
2017-12-31	981
2018-03-31	1185
2018-06-30	1111
2018-09-30	1069
2018-12-31	956
2019-03-31	902
2019-06-30	811
2019-09-30	700
2019-12-31	665
2020-03-31	562
2020-06-30	519
2020-09-30	519
2020-12-31	292
2021-03-31	277
2021-06-30	453
2021-09-30	750
2021-12-31	722
2022-03-31	662
2022-06-30	625
2022-09-30	548
2022-12-31	605
2023-03-31	803
2023-06-30	741
2023-09-30	808