Quarter	US dollars
1999-09-30	26
1999-12-31	23
2000-03-31	26
2000-06-30	15
2000-09-30	33
2000-12-31	94
2001-03-31	11
2001-06-30	30
2001-09-30	29
2001-12-31	138
2002-03-31	142
2002-06-30	140
2002-09-30	8
2002-12-31	42
2003-03-31	71
2003-06-30	61
2003-09-30	58
2003-12-31	66
2004-03-31	50
2004-06-30	40
2004-09-30	11
2004-12-31	48
2005-03-31	70
2005-06-30	100
2005-09-30	113
2005-12-31	290
2006-03-31	123
2006-06-30	92
2006-09-30	62
2006-12-31	47
2007-03-31	155
2007-06-30	435
2007-09-30	725
2007-12-31	938
2008-03-31	902
2008-06-30	740
2008-09-30	734
2008-12-31	584
2009-03-31	545
2009-06-30	550
2009-09-30	728
2009-12-31	694
2010-03-31	672
2010-06-30	889
2010-09-30	1130
2010-12-31	789
2011-03-31	694
2011-06-30	596
2011-09-30	958
2011-12-31	716
2012-03-31	615
2012-06-30	753
2012-09-30	715
2012-12-31	789
2013-03-31	697
2013-06-30	883
2013-09-30	910
2013-12-31	1230
2014-03-31	1135
2014-06-30	773
2014-09-30	867
2014-12-31	794
2015-03-31	1023
2015-06-30	919
2015-09-30	1247
2015-12-31	910
2016-03-31	1094
2016-06-30	1019
2016-09-30	776
2016-12-31	874
2017-03-31	660
2017-06-30	768
2017-09-30	718
2017-12-31	819
2018-03-31	704
2018-06-30	623
2018-09-30	918
2018-12-31	931
2019-03-31	937
2019-06-30	1153
2019-09-30	1455
2019-12-31	1295
2020-03-31	1760
2020-06-30	1617
2020-09-30	1683
2020-12-31	1680
2021-03-31	1155
2021-06-30	1079
2021-09-30	859
2021-12-31	740
2022-03-31	294
2022-06-30	321
2022-09-30	257
2022-12-31	271
2023-03-31	279
2023-06-30	279
2023-09-30	230