Quarter	US dollars
1999-03-31	56
1999-06-30	78
1999-09-30	67
1999-12-31	69
2000-03-31	59
2000-06-30	90
2000-09-30	100
2000-12-31	79
2001-03-31	72
2001-06-30	76
2001-09-30	83
2001-12-31	91
2002-03-31	93
2002-06-30	123
2002-09-30	126
2002-12-31	133
2003-03-31	107
2003-06-30	99
2003-09-30	112
2003-12-31	116
2004-03-31	113
2004-06-30	77
2004-09-30	85
2004-12-31	103
2005-03-31	358
2005-06-30	110
2005-09-30	155
2005-12-31	147
2006-03-31	174
2006-06-30	211
2006-09-30	339
2006-12-31	183
2007-03-31	187
2007-06-30	181
2007-09-30	217
2007-12-31	159
2008-03-31	168
2008-06-30	323
2008-09-30	226
2008-12-31	461
2009-03-31	394
2009-06-30	337
2009-09-30	409
2009-12-31	182
2010-03-31	217
2010-06-30	232
2010-09-30	173
2010-12-31	239
2011-03-31	281
2011-06-30	190
2011-09-30	371
2011-12-31	330
2012-03-31	257
2012-06-30	367
2012-09-30	300
2012-12-31	242
2013-03-31	320
2013-06-30	267
2013-09-30	245
2013-12-31	297
2014-03-31	290
2014-06-30	280
2014-09-30	301
2014-12-31	224
2015-03-31	239
2015-06-30	274
2015-09-30	113
2015-12-31	169
2016-03-31	200
2016-06-30	204
2016-09-30	211
2016-12-31	219
2017-03-31	182
2017-06-30	204
2017-09-30	207
2017-12-31	292
2018-03-31	288
2018-06-30	281
2018-09-30	203
2018-12-31	205
2019-03-31	176
2019-06-30	230
2019-09-30	268
2019-12-31	320
2020-03-31	160
2020-06-30	110
2020-09-30	106
2020-12-31	105
2021-03-31	143
2021-06-30	102
2021-09-30	114
2021-12-31	139
2022-03-31	179
2022-06-30	207
2022-09-30	179
2022-12-31	225
2023-03-31	215
2023-06-30	189
2023-09-30	137