Quarter	US dollars
1999-03-31	599
1999-06-30	618
1999-09-30	278
1999-12-31	703
2000-03-31	160
2000-06-30	140
2000-09-30	112
2000-12-31	276
2001-03-31	269
2001-06-30	280
2001-09-30	421
2001-12-31	380
2002-03-31	625
2002-06-30	681
2002-09-30	594
2002-12-31	565
2003-03-31	1297
2003-06-30	467
2003-09-30	625
2003-12-31	989
2004-03-31	705
2004-06-30	507
2004-09-30	556
2004-12-31	458
2005-03-31	463
2005-06-30	795
2005-09-30	577
2005-12-31	480
2006-03-31	527
2006-06-30	747
2006-09-30	406
2006-12-31	421
2007-03-31	546
2007-06-30	1100
2007-09-30	910
2007-12-31	426
2008-03-31	411
2008-06-30	414
2008-09-30	620
2008-12-31	439
2009-03-31	423
2009-06-30	437
2009-09-30	1133
2009-12-31	1221
2010-03-31	1391
2010-06-30	2992
2010-09-30	3652
2010-12-31	3068
2011-03-31	3461
2011-06-30	4717
2011-09-30	3703
2011-12-31	3067
2012-03-31	2577
2012-06-30	2535
2012-09-30	1613
2012-12-31	2168
2013-03-31	1782
2013-06-30	2021
2013-09-30	1962
2013-12-31	1514
2014-03-31	2150
2014-06-30	1556
2014-09-30	2361
2014-12-31	1851
2015-03-31	1918
2015-06-30	1990
2015-09-30	1350
2015-12-31	1294
2016-03-31	1056
2016-06-30	925
2016-09-30	1045
2016-12-31	1660
2017-03-31	1465
2017-06-30	1432
2017-09-30	1239
2017-12-31	927
2018-03-31	1238
2018-06-30	2148
2018-09-30	2339
2018-12-31	1052
2019-03-31	1178
2019-06-30	2054
2019-09-30	1631
2019-12-31	1914
2020-03-31	4507
2020-06-30	1920
2020-09-30	1678
2020-12-31	6912
2021-03-31	6516
2021-06-30	5631
2021-09-30	5433
2021-12-31	13361
2022-03-31	9224
2022-06-30	7403
2022-09-30	12568
2022-12-31	8390
2023-03-31	10108
2023-06-30	11369
2023-09-30	10756