Quarter	US dollars
1999-03-31	0
1999-06-30	0
1999-09-30	0
1999-12-31	0
2000-03-31	0
2000-06-30	3
2000-09-30	3
2000-12-31	0
2001-03-31	0
2001-06-30	0
2001-09-30	0
2001-12-31	21
2002-03-31	4
2002-06-30	4
2002-09-30	5
2002-12-31	6
2003-03-31	6
2003-06-30	6
2003-09-30	7
2003-12-31	38
2004-03-31	36
2004-06-30	16
2004-09-30	10
2004-12-31	10
2005-03-31	10
2005-06-30	12
2005-09-30	9
2005-12-31	22
2006-03-31	25
2006-06-30	28
2006-09-30	43
2006-12-31	22
2007-03-31	29
2007-06-30	19
2007-09-30	10
2007-12-31	10
2008-03-31	12
2008-06-30	12
2008-09-30	13
2008-12-31	10
2009-03-31	13
2009-06-30	23
2009-09-30	29
2009-12-31	37
2010-03-31	44
2010-06-30	37
2010-09-30	41
2010-12-31	40
2011-03-31	34
2011-06-30	34
2011-09-30	28
2011-12-31	30
2012-03-31	26
2012-06-30	32
2012-09-30	35
2012-12-31	25
2013-03-31	22
2013-06-30	21
2013-09-30	19
2013-12-31	29
2014-03-31	32
2014-06-30	29
2014-09-30	29
2014-12-31	20
2015-03-31	18
2015-06-30	15