Quarter	US dollars
1999-03-31	241
1999-06-30	219
1999-09-30	252
1999-12-31	181
2000-03-31	203
2000-06-30	186
2000-09-30	163
2000-12-31	170
2001-03-31	154
2001-06-30	182
2001-09-30	179
2001-12-31	175
2002-03-31	156
2002-06-30	152
2002-09-30	138
2002-12-31	142
2003-03-31	138
2003-06-30	177
2003-09-30	167
2003-12-31	167
2004-03-31	166
2004-06-30	169
2004-09-30	211
2004-12-31	236
2005-03-31	231
2005-06-30	250
2005-09-30	223
2005-12-31	220
2006-03-31	216
2006-06-30	220
2006-09-30	229
2006-12-31	206
2007-03-31	179
2007-06-30	190
2007-09-30	177
2007-12-31	167
2008-03-31	180
2008-06-30	149
2008-09-30	136
2008-12-31	127
2009-03-31	127
2009-06-30	136
2009-09-30	137
2009-12-31	137
2010-03-31	136
2010-06-30	140
2010-09-30	151
2010-12-31	162
2011-03-31	165
2011-06-30	164
2011-09-30	151
2011-12-31	162
2012-03-31	187
2012-06-30	196
2012-09-30	203
2012-12-31	153
2013-03-31	141
2013-06-30	114
2013-09-30	95
2013-12-31	83
2014-03-31	73
2014-06-30	62
2014-09-30	62
2014-12-31	50
2015-03-31	44
2015-06-30	48
2015-09-30	47
2015-12-31	66
2016-03-31	54
2016-06-30	49
2016-09-30	36
2016-12-31	34
2017-03-31	35
2017-06-30	31
2017-09-30	30
2017-12-31	25
2018-03-31	24
2018-06-30	30
2018-09-30	23
2018-12-31	18
2019-03-31	16
2019-06-30	17
2019-09-30	18
2019-12-31	24
2020-03-31	21
2020-06-30	18
2020-09-30	19
2020-12-31	19
2021-03-31	17
2021-06-30	19
2021-09-30	19
2021-12-31	16
2022-03-31	18
2022-06-30	16
2022-09-30	16
2022-12-31	14
2023-03-31	12
2023-06-30	16
2023-09-30	13