Quarter	US dollars
1999-09-30	140
1999-12-31	205
2000-03-31	271
2000-06-30	259
2000-09-30	268
2000-12-31	289
2001-03-31	259
2001-06-30	301
2001-09-30	304
2001-12-31	333
2002-03-31	330
2002-06-30	285
2002-09-30	266
2002-12-31	229
2003-03-31	169
2003-06-30	186
2003-09-30	193
2003-12-31	163
2004-03-31	151
2004-06-30	62
2004-09-30	60
2004-12-31	109
2005-03-31	248
2005-06-30	109
2005-09-30	104
2005-12-31	113
2006-03-31	92
2006-06-30	102
2006-09-30	105
2006-12-31	162
2007-03-31	184
2007-06-30	167
2007-09-30	177
2007-12-31	173
2008-03-31	217
2008-06-30	227
2008-09-30	214
2008-12-31	208
2009-03-31	181
2009-06-30	171
2009-09-30	214
2009-12-31	187
2010-03-31	180
2010-06-30	165
2010-09-30	173
2010-12-31	208
2011-03-31	191
2011-06-30	223
2011-09-30	227
2011-12-31	267
2012-03-31	296
2012-06-30	301
2012-09-30	247
2012-12-31	234
2013-03-31	287
2013-06-30	305
2013-09-30	194
2013-12-31	177
2014-03-31	150
2014-06-30	68
2014-09-30	91
2014-12-31	126
2015-03-31	86
2015-06-30	47
2015-09-30	67
2015-12-31	58
2016-03-31	52
2016-06-30	78
2016-09-30	83
2016-12-31	124
2017-03-31	104
2017-06-30	79
2017-09-30	93
2017-12-31	88
2018-03-31	91
2018-06-30	55
2018-09-30	40
2018-12-31	40
2019-03-31	29
2019-06-30	20
2019-09-30	136
2019-12-31	37
2020-03-31	33
2020-06-30	47
2020-09-30	13
2020-12-31	7
2021-03-31	-1
2021-06-30	3
2021-09-30	8
2021-12-31	39
2022-03-31	-1
2022-06-30	50
2022-09-30	58
2022-12-31	41
2023-03-31	26
2023-06-30	31
2023-09-30	36