Quarter	US dollars
1999-03-31	311
1999-06-30	248
1999-09-30	216
1999-12-31	96
2000-03-31	324
2000-06-30	120
2000-09-30	98
2000-12-31	1153
2001-03-31	119
2001-06-30	105
2001-09-30	57
2001-12-31	51
2002-03-31	50
2002-06-30	63
2002-09-30	58
2002-12-31	62
2003-03-31	60
2003-06-30	63
2003-09-30	65
2003-12-31	73
2004-03-31	49
2004-06-30	48
2004-09-30	53
2004-12-31	51
2005-03-31	50
2005-06-30	52
2005-09-30	56
2005-12-31	61
2006-03-31	58
2006-06-30	68
2006-09-30	73
2006-12-31	73
2007-03-31	70
2007-06-30	73
2007-09-30	73
2007-12-31	76
2008-03-31	84
2008-06-30	80
2008-09-30	54
2008-12-31	44
2009-03-31	41
2009-06-30	45
2009-09-30	51
2009-12-31	39
2010-03-31	45
2010-06-30	43
2010-09-30	51
2010-12-31	46
2011-03-31	31
2011-06-30	19
2011-09-30	14
2011-12-31	15
2012-03-31	35
2012-06-30	30
2012-09-30	31
2012-12-31	25
2013-03-31	23
2013-06-30	22
2013-09-30	27
2013-12-31	15
2014-03-31	7
2014-06-30	9
2014-09-30	15
2014-12-31	14
2015-03-31	22
2015-06-30	20