Quarter	US dollars
1999-03-31	268
1999-06-30	297
1999-09-30	292
1999-12-31	247
2000-03-31	253
2000-06-30	251
2000-09-30	243
2000-12-31	245
2001-03-31	246
2001-06-30	247
2001-09-30	252
2001-12-31	346
2002-03-31	347
2002-06-30	412
2002-09-30	301
2002-12-31	565
2003-03-31	621
2003-06-30	656
2003-09-30	593
2003-12-31	540
2004-03-31	598
2004-06-30	543
2004-09-30	702
2004-12-31	541
2005-03-31	555
2005-06-30	687
2005-09-30	587
2005-12-31	661
2006-03-31	705
2006-06-30	591
2006-09-30	650
2006-12-31	396
2007-03-31	179
2007-06-30	266
2007-09-30	243
2007-12-31	244
2008-03-31	232
2008-06-30	263
2008-09-30	257
2008-12-31	199
2009-03-31	262
2009-06-30	278
2009-09-30	267
2009-12-31	273
2010-03-31	267
2010-06-30	241
2010-09-30	430
2010-12-31	282
2011-03-31	418
2011-06-30	400
2011-09-30	699
2011-12-31	387
2012-03-31	380
2012-06-30	223
2012-09-30	234
2012-12-31	173
2013-03-31	157
2013-06-30	164
2013-09-30	146
2013-12-31	86
2014-03-31	119
2014-06-30	125
2014-09-30	140
2014-12-31	131
2015-03-31	139
2015-06-30	158
2015-09-30	120
2015-12-31	122
2016-03-31	123
2016-06-30	143
2016-09-30	136
2016-12-31	130
2017-03-31	136
2017-06-30	96
2017-09-30	82
2017-12-31	115
2018-03-31	82
2018-06-30	86
2018-09-30	88
2018-12-31	35
2019-03-31	34
2019-06-30	27
2019-09-30	158
2019-12-31	157
2020-03-31	142
2020-06-30	178
2020-09-30	175
2020-12-31	176
2021-03-31	176
2021-06-30	254
2021-09-30	233
2021-12-31	228
2022-03-31	206
2022-06-30	136
2022-09-30	87
2022-12-31	94
2023-03-31	165
2023-06-30	181
2023-09-30	176