Quarter	US dollars
1999-03-31	322
1999-06-30	407
1999-09-30	444
1999-12-31	411
2000-03-31	398
2000-06-30	431
2000-09-30	362
2000-12-31	436
2001-03-31	425
2001-06-30	491
2001-09-30	540
2001-12-31	872
2002-03-31	715
2002-06-30	717
2002-09-30	964
2002-12-31	635
2003-03-31	583
2003-06-30	772
2003-09-30	829
2003-12-31	1711
2004-03-31	949
2004-06-30	953
2004-09-30	986
2004-12-31	860
2005-03-31	562
2005-06-30	864
2005-09-30	783
2005-12-31	3728
2006-03-31	3547
2006-06-30	1093
2006-09-30	1015
2006-12-31	1619
2007-03-31	1638
2007-06-30	1976
2007-09-30	4915
2007-12-31	1835
2008-03-31	1966
2008-06-30	2642
2008-09-30	3100
2008-12-31	2463
2009-03-31	1619
2009-06-30	1695
2009-09-30	2129
2009-12-31	1414
2010-03-31	2040
2010-06-30	2323
2010-09-30	2894
2010-12-31	2613
2011-03-31	2877
2011-06-30	2902
2011-09-30	3191
2011-12-31	2838
2012-03-31	3454
2012-06-30	2699
2012-09-30	3491
2012-12-31	2792
2013-03-31	2522
2013-06-30	2689
2013-09-30	3770
2013-12-31	2918
2014-03-31	3051
2014-06-30	3705
2014-09-30	4337
2014-12-31	3743
2015-03-31	3982
2015-06-30	4441
2015-09-30	5172
2015-12-31	4273
2016-03-31	4440
2016-06-30	4098
2016-09-30	6229
2016-12-31	3561
2017-03-31	4883
2017-06-30	5958
2017-09-30	5597
2017-12-31	7122
2018-03-31	6531
2018-06-30	7146
2018-09-30	5826
2018-12-31	5050
2019-03-31	5840
2019-06-30	8379
2019-09-30	8451
2019-12-31	7023
2020-03-31	9410
2020-06-30	8046
2020-09-30	11597
2020-12-31	7885
2021-03-31	9267
2021-06-30	10224
2021-09-30	9179
2021-12-31	9133
2022-03-31	12563
2022-06-30	10314
2022-09-30	8876
2022-12-31	8247
2023-03-31	9225
2023-06-30	8810
2023-09-30	7897