Quarter	US dollars
1999-03-31	9
1999-06-30	8
1999-09-30	2
1999-12-31	2
2000-03-31	3
2000-06-30	4
2000-09-30	3
2000-12-31	3
2001-03-31	3
2001-06-30	1
2001-09-30	1
2001-12-31	0
2002-03-31	0
2002-06-30	0
2002-09-30	0
2002-12-31	0
2003-03-31	0
2003-06-30	0
2003-09-30	8
2003-12-31	1
2004-03-31	0
2004-06-30	2
2004-09-30	0
2004-12-31	5
2005-03-31	4
2005-06-30	2
2005-09-30	3
2005-12-31	4
2006-03-31	101
2006-06-30	105
2006-09-30	109
2006-12-31	151
2007-03-31	153
2007-06-30	282
2007-09-30	284
2007-12-31	289
2008-03-31	292
2008-06-30	223
2008-09-30	240
2008-12-31	226
2009-03-31	213
2009-06-30	195
2009-09-30	147
2009-12-31	161
2010-03-31	163
2010-06-30	181
2010-09-30	187
2010-12-31	192
2011-03-31	54
2011-06-30	87
2011-09-30	93
2011-12-31	66
2012-03-31	202
2012-06-30	96
2012-09-30	45
2012-12-31	122
2013-03-31	119
2013-06-30	85
2013-09-30	197
2013-12-31	112
2014-03-31	171
2014-06-30	84
2014-09-30	47
2014-12-31	15
2015-03-31	7
2015-06-30	9