Quarter	US dollars
1999-03-31	50
1999-06-30	57
1999-09-30	80
1999-12-31	79
2000-03-31	50
2000-06-30	52
2000-09-30	62
2000-12-31	62
2001-03-31	52
2001-06-30	51
2001-09-30	108
2001-12-31	131
2002-03-31	101
2002-06-30	95
2002-09-30	96
2002-12-31	98
2003-03-31	94
2003-06-30	104
2003-09-30	122
2003-12-31	74
2004-03-31	69
2004-06-30	54
2004-09-30	53
2004-12-31	58
2005-03-31	45
2005-06-30	31
2005-09-30	28
2005-12-31	325
2006-03-31	49
2006-06-30	89
2006-09-30	90
2006-12-31	86
2007-03-31	80
2007-06-30	72
2007-09-30	90
2007-12-31	54
2008-03-31	86
2008-06-30	114
2008-09-30	146
2008-12-31	135
2009-03-31	140
2009-06-30	230
2009-09-30	201
2009-12-31	184
2010-03-31	207
2010-06-30	131
2010-09-30	132
2010-12-31	129
2011-03-31	125
2011-06-30	145
2011-09-30	139
2011-12-31	103
2012-03-31	116
2012-06-30	112
2012-09-30	111
2012-12-31	108
2013-03-31	121
2013-06-30	127
2013-09-30	108
2013-12-31	140
2014-03-31	127
2014-06-30	123
2014-09-30	99
2014-12-31	71
2015-03-31	70
2015-06-30	58