Quarter	US dollars
1999-03-31	34
1999-06-30	37
1999-09-30	41
1999-12-31	18
2000-03-31	2
2000-06-30	2
2000-09-30	18
2000-12-31	13
2001-03-31	29
2001-06-30	56
2001-09-30	185
2001-12-31	233
2002-03-31	220
2002-06-30	169
2002-09-30	848
2002-12-31	96
2003-03-31	423
2003-06-30	332
2003-09-30	367
2003-12-31	617
2004-03-31	673
2004-06-30	549
2004-09-30	758
2004-12-31	628
2005-03-31	769
2005-06-30	1080
2005-09-30	1267
2005-12-31	1923
2006-03-31	1891
2006-06-30	2057
2006-09-30	2139
2006-12-31	5582
2007-03-31	7007
2007-06-30	6975
2007-09-30	5558
2007-12-31	4388
2008-03-31	4639
2008-06-30	5524
2008-09-30	3632
2008-12-31	2597
2009-03-31	2375
2009-06-30	1951
2009-09-30	2132
2009-12-31	2325
2010-03-31	3165
2010-06-30	2456
2010-09-30	2403
2010-12-31	2789
2011-03-31	3608
2011-06-30	3306
2011-09-30	1958
2011-12-31	1770
2012-03-31	1650
2012-06-30	1071
2012-09-30	1041
2012-12-31	1004
2013-03-31	903
2013-06-30	730
2013-09-30	707
2013-12-31	524
2014-03-31	515
2014-06-30	473
2014-09-30	373
2014-12-31	434
2015-03-31	293
2015-06-30	243
2015-09-30	243
2015-12-31	198
2016-03-31	212
2016-06-30	174
2016-09-30	159
2016-12-31	142
2017-03-31	164
2017-06-30	91
2017-09-30	168
2017-12-31	65
2018-03-31	276
2018-06-30	210
2018-09-30	152
2018-12-31	187
2019-03-31	170
2019-06-30	149
2019-09-30	141
2019-12-31	125
2020-03-31	141
2020-06-30	133
2020-09-30	123
2020-12-31	126
2021-03-31	265
2021-06-30	265
2021-09-30	222
2021-12-31	195
2022-03-31	124
2022-06-30	160
2022-09-30	204
2022-12-31	589
2023-03-31	166
2023-06-30	171
2023-09-30	312