Quarter	US dollars
2004-12-31	100
2005-03-31	106
2005-06-30	22
2005-09-30	42
2005-12-31	53
2006-03-31	69
2006-06-30	102
2006-09-30	116
2006-12-31	166
2007-03-31	161
2007-06-30	197
2007-09-30	155
2007-12-31	135
2008-03-31	127
2008-06-30	115
2008-09-30	118
2008-12-31	72
2009-03-31	85
2009-06-30	81
2009-09-30	80
2009-12-31	84
2010-03-31	88
2010-06-30	103
2010-09-30	109
2010-12-31	124
2011-03-31	117
2011-06-30	79
2011-09-30	132
2011-12-31	113
2012-03-31	104
2012-06-30	97
2012-09-30	108
2012-12-31	110
2013-03-31	88
2013-06-30	74
2013-09-30	65
2013-12-31	109
2014-03-31	105
2014-06-30	115
2014-09-30	120
2014-12-31	115
2015-03-31	117
2015-06-30	101
2015-09-30	117
2015-12-31	111
2016-03-31	37
2016-06-30	36
2016-09-30	32
2016-12-31	32
2017-03-31	30
2017-06-30	32
2017-09-30	15
2017-12-31	15
2018-03-31	17
2018-06-30	16
2018-09-30	16
2018-12-31	8
2019-03-31	9
2019-06-30	34
2019-09-30	47
2019-12-31	45
2020-03-31	41
2020-06-30	41
2020-09-30	5
2020-12-31	35
2021-03-31	4
2021-06-30	6
2021-09-30	8
2021-12-31	66
2022-03-31	67
2022-06-30	67
2022-09-30	65
2022-12-31	65
2023-03-31	65
2023-06-30	64
2023-09-30	64