Quarter	US dollars
1999-03-31	236
1999-06-30	220
1999-09-30	278
1999-12-31	215
2000-03-31	197
2000-06-30	191
2000-09-30	180
2000-12-31	200
2001-03-31	184
2001-06-30	159
2001-09-30	154
2001-12-31	148
2002-03-31	158
2002-06-30	159
2002-09-30	169
2002-12-31	148
2003-03-31	149
2003-06-30	143
2003-09-30	146
2003-12-31	158
2004-03-31	147
2004-06-30	128
2004-09-30	126
2004-12-31	126
2005-03-31	112
2005-06-30	103
2005-09-30	98
2005-12-31	91
2006-03-31	85
2006-06-30	85
2006-09-30	100
2006-12-31	97
2007-03-31	107
2007-06-30	74
2007-09-30	70
2007-12-31	86
2008-03-31	82
2008-06-30	99
2008-09-30	107
2008-12-31	95
2009-03-31	82
2009-06-30	111
2009-09-30	108
2009-12-31	94
2010-03-31	73
2010-06-30	82
2010-09-30	87
2010-12-31	78
2011-03-31	87
2011-06-30	84
2011-09-30	103
2011-12-31	73
2012-03-31	103
2012-06-30	82
2012-09-30	137
2012-12-31	163
2013-03-31	193
2013-06-30	138
2013-09-30	178
2013-12-31	137
2014-03-31	172
2014-06-30	129
2014-09-30	164
2014-12-31	123
2015-03-31	163
2015-06-30	119
2015-09-30	158
2015-12-31	141
2016-03-31	172
2016-06-30	141
2016-09-30	169
2016-12-31	156
2017-03-31	211
2017-06-30	166
2017-09-30	205
2017-12-31	163
2018-03-31	281
2018-06-30	250
2018-09-30	288
2018-12-31	199
2019-03-31	241
2019-06-30	207
2019-09-30	236
2019-12-31	199
2020-03-31	198
2020-06-30	155
2020-09-30	187
2020-12-31	193
2021-03-31	204
2021-06-30	147
2021-09-30	183
2021-12-31	184
2022-03-31	177
2022-06-30	175
2022-09-30	219
2022-12-31	209
2023-03-31	222
2023-06-30	185
2023-09-30	197