Quarter	US dollars
2004-12-31	60
2005-03-31	51
2005-06-30	50
2005-09-30	57
2005-12-31	64
2006-03-31	73
2006-06-30	65
2006-09-30	62
2006-12-31	80
2007-03-31	80
2007-06-30	100
2007-09-30	100
2007-12-31	98
2008-03-31	135
2008-06-30	195
2008-09-30	209
2008-12-31	243
2009-03-31	218
2009-06-30	245
2009-09-30	251
2009-12-31	257
2010-03-31	243
2010-06-30	190
2010-09-30	172
2010-12-31	168
2011-03-31	167
2011-06-30	161
2011-09-30	160
2011-12-31	156
2012-03-31	155
2012-06-30	152
2012-09-30	149
2012-12-31	129
2013-03-31	131
2013-06-30	79
2013-09-30	83
2013-12-31	102
2014-03-31	77
2014-06-30	104
2014-09-30	113
2014-12-31	115
2015-03-31	111
2015-06-30	93
2015-09-30	129
2015-12-31	135
2016-03-31	144
2016-06-30	105
2016-09-30	97
2016-12-31	76
2017-03-31	81
2017-06-30	71
2017-09-30	76
2017-12-31	55
2018-03-31	84
2018-06-30	74
2018-09-30	81
2018-12-31	74
2019-03-31	77
2019-06-30	67
2019-09-30	68
2019-12-31	67
2020-03-31	67
2020-06-30	67
2020-09-30	67
2020-12-31	67
2021-03-31	68
2021-06-30	68
2021-09-30	67
2021-12-31	67
2022-03-31	67
2022-06-30	67
2022-09-30	67
2022-12-31	67
2023-03-31	33
2023-06-30	33
2023-09-30	33