Quarter	US dollars
1999-03-31	1
1999-06-30	0
1999-09-30	1
1999-12-31	1
2000-03-31	1
2000-06-30	1
2000-09-30	1
2000-12-31	1
2001-03-31	0
2001-06-30	31
2001-09-30	1
2001-12-31	1
2002-03-31	16
2002-06-30	1
2002-09-30	2
2002-12-31	2
2003-03-31	2
2003-06-30	2
2003-09-30	25
2003-12-31	273
2004-03-31	311
2004-06-30	224
2004-09-30	163
2004-12-31	43
2005-03-31	22
2005-06-30	7
2005-09-30	2
2005-12-31	2
2006-03-31	15
2006-06-30	1
2006-09-30	2
2006-12-31	2
2007-03-31	3
2007-06-30	3
2007-09-30	2
2007-12-31	1
2008-03-31	4
2008-06-30	6
2008-09-30	4
2008-12-31	5
2009-03-31	3
2009-06-30	3
2009-09-30	4
2009-12-31	4
2010-03-31	4
2010-06-30	5
2010-09-30	3
2010-12-31	3
2011-03-31	2
2011-06-30	1
2011-09-30	4
2011-12-31	1
2012-03-31	3
2012-06-30	1
2012-09-30	3
2012-12-31	3
2013-03-31	2
2013-06-30	2
2013-09-30	2
2013-12-31	2
2014-03-31	1
2014-06-30	2
2014-09-30	1
2014-12-31	1
2015-03-31	1
2015-06-30	1