Quarter	US dollars
1999-03-31	106
1999-06-30	110
1999-09-30	102
1999-12-31	101
2000-03-31	103
2000-06-30	105
2000-09-30	100
2000-12-31	107
2001-03-31	107
2001-06-30	104
2001-09-30	101
2001-12-31	97
2002-03-31	95
2002-06-30	108
2002-09-30	102
2002-12-31	107
2003-03-31	134
2003-06-30	148
2003-09-30	144
2003-12-31	146
2004-03-31	144
2004-06-30	137
2004-09-30	134
2004-12-31	174
2005-03-31	170
2005-06-30	155
2005-09-30	156
2005-12-31	147
2006-03-31	128
2006-06-30	145
2006-09-30	139
2006-12-31	136
2007-03-31	133
2007-06-30	159
2007-09-30	156
2007-12-31	145
2008-03-31	145
2008-06-30	153
2008-09-30	143
2008-12-31	124
2009-03-31	94
2009-06-30	101
2009-09-30	97
2009-12-31	92
2010-03-31	98
2010-06-30	83
2010-09-30	84
2010-12-31	87
2011-03-31	82
2011-06-30	78
2011-09-30	77
2011-12-31	80
2012-03-31	87
2012-06-30	79
2012-09-30	154
2012-12-31	171
2013-03-31	131
2013-06-30	151
2013-09-30	147
2013-12-31	169
2014-03-31	153
2014-06-30	164
2014-09-30	131
2014-12-31	168
2015-03-31	160
2015-06-30	160
2015-09-30	155
2015-12-31	164
2016-03-31	163
2016-06-30	163
2016-09-30	158
2016-12-31	148
2017-03-31	187
2017-06-30	194
2017-09-30	180
2017-12-31	193
2018-03-31	201
2018-06-30	169
2018-09-30	122
2018-12-31	116
2019-03-31	123
2019-06-30	134
2019-09-30	98
2019-12-31	99
2020-03-31	69
2020-06-30	72
2020-09-30	81
2020-12-31	85
2021-03-31	106
2021-06-30	87
2021-09-30	85
2021-12-31	114
2022-03-31	136
2022-06-30	144
2022-09-30	117
2022-12-31	124
2023-03-31	130
2023-06-30	323
2023-09-30	312