Quarter	US dollars
1999-03-31	763
1999-06-30	831
1999-09-30	1154
1999-12-31	945
2000-03-31	1350
2000-06-30	2117
2000-09-30	2364
2000-12-31	2352
2001-03-31	1140
2001-06-30	1753
2001-09-30	1371
2001-12-31	2092
2002-03-31	1687
2002-06-30	1777
2002-09-30	1679
2002-12-31	1542
2003-03-31	906
2003-06-30	1041
2003-09-30	872
2003-12-31	1253
2004-03-31	996
2004-06-30	1099
2004-09-30	1033
2004-12-31	1292
2005-03-31	982
2005-06-30	1074
2005-09-30	1514
2005-12-31	2034
2006-03-31	2425
2006-06-30	1485
2006-09-30	2196
2006-12-31	1103
2007-03-31	1538
2007-06-30	1600
2007-09-30	1409
2007-12-31	3758
2008-03-31	1526
2008-06-30	2692
2008-09-30	2144
2008-12-31	5757
2009-03-31	5097
2009-06-30	6476
2009-09-30	3116
2009-12-31	4671
2010-03-31	5791
2010-06-30	7890
2010-09-30	6642
2010-12-31	9206
2011-03-31	12565
2011-06-30	10511
2011-09-30	10141
2011-12-31	15261
2012-03-31	25159
2012-06-30	28721
2012-09-30	25226
2012-12-31	18508
2013-03-31	15660
2013-06-30	11947
2013-09-30	12458
2013-12-31	7427
2014-03-31	8821
2014-06-30	6245
2014-09-30	6519
2014-12-31	7471
2015-03-31	3554
2015-06-30	4124
2015-09-30	3211
2015-12-31	8240
2016-03-31	4580
2016-06-30	6171
2016-09-30	6438
2016-12-31	5698
2017-03-31	5224
2017-06-30	5530
2017-09-30	9980
2017-12-31	9099
2018-03-31	9266
2018-06-30	9002
2018-09-30	8444
2018-12-31	8412
2019-03-31	11724
2019-06-30	14131
2019-09-30	13411
2019-12-31	11478
2020-03-31	13839
2020-06-30	8578
2020-09-30	7387
2020-12-31	6708
2021-03-31	8549
2021-06-30	10098
2021-09-30	22666
2021-12-31	23185
2022-03-31	21568
2022-06-30	23287
2022-09-30	24706
2022-12-31	27743
2023-03-31	32128
2023-06-30	35960
2023-09-30	38296