Quarter	US dollars
1999-09-30	743
1999-12-31	429
2000-03-31	442
2000-06-30	598
2000-09-30	458
2000-12-31	604
2001-03-31	1056
2001-06-30	560
2001-09-30	698
2001-12-31	623
2002-03-31	659
2002-06-30	883
2002-09-30	879
2002-12-31	892
2003-03-31	1083
2003-06-30	936
2003-09-30	1097
2003-12-31	1531
2004-03-31	1121
2004-06-30	1226
2004-09-30	1171
2004-12-31	1672
2005-03-31	1652
2005-06-30	1672
2005-09-30	1643
2005-12-31	1579
2006-03-31	1953
2006-06-30	1951
2006-09-30	2494
2006-12-31	2568
2007-03-31	3181
2007-06-30	2416
2007-09-30	4721
2007-12-31	3488
2008-03-31	5633
2008-06-30	2633
2008-09-30	4947
2008-12-31	1886
2009-03-31	1777
2009-06-30	2215
2009-09-30	3327
2009-12-31	2598
2010-03-31	3061
2010-06-30	3166
2010-09-30	3305
2010-12-31	4172
2011-03-31	4628
2011-06-30	5220
2011-09-30	4705
2011-12-31	4365
2012-03-31	6119
2012-06-30	4543
2012-09-30	4183
2012-12-31	3969
2013-03-31	3404
2013-06-30	2933
2013-09-30	3760
2013-12-31	4851
2014-03-31	3683
2014-06-30	4739
2014-09-30	4543
2014-12-31	5329
2015-03-31	4035
2015-06-30	5431
2015-09-30	5694
2015-12-31	3971
2016-03-31	4473
2016-06-30	3909
2016-09-30	3776
2016-12-31	3622
2017-03-31	4960
2017-06-30	5193
2017-09-30	5222
2017-12-31	5608
2018-03-31	4763
2018-06-30	4333
2018-09-30	3868
2018-12-31	3321
2019-03-31	2808
2019-06-30	2887
2019-09-30	2718
2019-12-31	4654
2020-03-31	2306
2020-06-30	2306
2020-09-30	2396
2020-12-31	3313
2021-03-31	1978
2021-06-30	2026
2021-09-30	1717
2021-12-31	5500
2022-03-31	8293
2022-06-30	9822
2022-09-30	12292
2022-12-31	6919
2023-03-31	4848
2023-06-30	5541
2023-09-30	5001