Quarter	US dollars
1999-03-31	275
1999-06-30	314
1999-09-30	307
1999-12-31	266
2000-03-31	196
2000-06-30	149
2000-09-30	163
2000-12-31	244
2001-03-31	119
2001-06-30	142
2001-09-30	213
2001-12-31	174
2002-03-31	94
2002-06-30	94
2002-09-30	179
2002-12-31	148
2003-03-31	69
2003-06-30	78
2003-09-30	91
2003-12-31	77
2004-03-31	86
2004-06-30	92
2004-09-30	115
2004-12-31	100
2005-03-31	75
2005-06-30	85
2005-09-30	104
2005-12-31	89
2006-03-31	66
2006-06-30	86
2006-09-30	88
2006-12-31	78
2007-03-31	62
2007-06-30	69
2007-09-30	83
2007-12-31	84
2008-03-31	66
2008-06-30	67
2008-09-30	74
2008-12-31	74
2009-03-31	56
2009-06-30	60
2009-09-30	63
2009-12-31	64
2010-03-31	43
2010-06-30	53
2010-09-30	65
2010-12-31	65
2011-03-31	87
2011-06-30	129
2011-09-30	126
2011-12-31	171
2012-03-31	155
2012-06-30	131
2012-09-30	110
2012-12-31	149
2013-03-31	164
2013-06-30	165
2013-09-30	196
2013-12-31	279
2014-03-31	234
2014-06-30	275
2014-09-30	277
2014-12-31	202
2015-03-31	202
2015-06-30	179
2015-09-30	176
2015-12-31	175
2016-03-31	157
2016-06-30	176
2016-09-30	183
2016-12-31	125
2017-03-31	97
2017-06-30	114
2017-09-30	119
2017-12-31	146
2018-03-31	125
2018-06-30	130
2018-09-30	152
2018-12-31	141
2019-03-31	120
2019-06-30	109
2019-09-30	108
2019-12-31	112
2020-03-31	97
2020-06-30	89
2020-09-30	98
2020-12-31	88
2021-03-31	83
2021-06-30	101
2021-09-30	91
2021-12-31	84
2022-03-31	82
2022-06-30	87
2022-09-30	84
2022-12-31	81
2023-03-31	76
2023-06-30	77
2023-09-30	81