Quarter	US dollars
1999-03-31	185
1999-06-30	175
1999-09-30	156
1999-12-31	152
2000-03-31	153
2000-06-30	232
2000-09-30	158
2000-12-31	61
2001-03-31	68
2001-06-30	141
2001-09-30	144
2001-12-31	112
2002-03-31	99
2002-06-30	93
2002-09-30	152
2002-12-31	173
2003-03-31	204
2003-06-30	292
2003-09-30	303
2003-12-31	292
2004-03-31	419
2004-06-30	454
2004-09-30	289
2004-12-31	524
2005-03-31	458
2005-06-30	474
2005-09-30	526
2005-12-31	817
2006-03-31	708
2006-06-30	753
2006-09-30	739
2006-12-31	922
2007-03-31	970
2007-06-30	1348
2007-09-30	1066
2007-12-31	1642
2008-03-31	1594
2008-06-30	1806
2008-09-30	1383
2008-12-31	1185
2009-03-31	854
2009-06-30	670
2009-09-30	464
2009-12-31	641
2010-03-31	812
2010-06-30	810
2010-09-30	764
2010-12-31	238
2011-03-31	293
2011-06-30	300
2011-09-30	552
2011-12-31	922
2012-03-31	860
2012-06-30	883
2012-09-30	849
2012-12-31	977
2013-03-31	628
2013-06-30	710
2013-09-30	768
2013-12-31	711
2014-03-31	581
2014-06-30	1071
2014-09-30	861
2014-12-31	685
2015-03-31	645
2015-06-30	576
2015-09-30	0
2015-12-31	0
2016-03-31	0
2016-06-30	0
2016-09-30	0
2016-12-31	0
2017-03-31	0
2017-06-30	0
2017-09-30	0
2017-12-31	0
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	0
2019-06-30	0
2019-09-30	0
2019-12-31	0
2020-03-31	0
2020-06-30	0
2020-09-30	0
2020-12-31	0
2021-03-31	0
2021-06-30	0
2021-09-30	0
2021-12-31	0
2022-03-31	0
2022-06-30	0
2022-09-30	0
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	0