Quarter	US dollars
1999-03-31	176
1999-06-30	123
1999-09-30	121
1999-12-31	269
2000-03-31	313
2000-06-30	371
2000-09-30	209
2000-12-31	443
2001-03-31	635
2001-06-30	607
2001-09-30	777
2001-12-31	985
2002-03-31	1048
2002-06-30	1019
2002-09-30	1102
2002-12-31	1076
2003-03-31	909
2003-06-30	792
2003-09-30	1203
2003-12-31	1277
2004-03-31	1316
2004-06-30	1258
2004-09-30	1360
2004-12-31	1453
2005-03-31	1347
2005-06-30	1359
2005-09-30	1275
2005-12-31	1489
2006-03-31	1840
2006-06-30	2553
2006-09-30	3227
2006-12-31	3076
2007-03-31	3269
2007-06-30	3125
2007-09-30	3279
2007-12-31	3553
2008-03-31	3558
2008-06-30	3342
2008-09-30	4048
2008-12-31	1373
2009-03-31	186
2009-06-30	204
2009-09-30	942
2009-12-31	1328
2010-03-31	1335
2010-06-30	1460
2010-09-30	1543
2010-12-31	1609
2011-03-31	2108
2011-06-30	2902
2011-09-30	1082
2011-12-31	1242
2012-03-31	1171
2012-06-30	1056
2012-09-30	264
2012-12-31	95
2013-03-31	110
2013-06-30	87
2013-09-30	110
2013-12-31	226
2014-03-31	211
2014-06-30	198
2014-09-30	197
2014-12-31	154
2015-03-31	151
2015-06-30	197
2015-09-30	145
2015-12-31	145
2016-03-31	197
2016-06-30	86
2016-09-30	162
2016-12-31	156
2017-03-31	197
2017-06-30	160
2017-09-30	81
2017-12-31	25
2018-03-31	215
2018-06-30	1645
2018-09-30	1458
2018-12-31	1515
2019-03-31	120
2019-06-30	0
2019-09-30	3
2019-12-31	0
2020-03-31	140
2020-06-30	198
2020-09-30	356
2020-12-31	395
2021-03-31	80
2021-06-30	122
2021-09-30	0
2021-12-31	0
2022-03-31	50
2022-06-30	0
2022-09-30	42
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	0