Quarter	US dollars
1999-03-31	55
1999-06-30	55
1999-09-30	57
1999-12-31	57
2000-03-31	50
2000-06-30	49
2000-09-30	48
2000-12-31	43
2001-03-31	35
2001-06-30	34
2001-09-30	38
2001-12-31	37
2002-03-31	39
2002-06-30	38
2002-09-30	50
2002-12-31	107
2003-03-31	56
2003-06-30	54
2003-09-30	59
2003-12-31	57
2004-03-31	65
2004-06-30	62
2004-09-30	72
2004-12-31	75
2005-03-31	79
2005-06-30	74
2005-09-30	73
2005-12-31	71
2006-03-31	70
2006-06-30	92
2006-09-30	71
2006-12-31	88
2007-03-31	88
2007-06-30	106
2007-09-30	107
2007-12-31	106
2008-03-31	114
2008-06-30	113
2008-09-30	113
2008-12-31	103
2009-03-31	105
2009-06-30	106
2009-09-30	142
2009-12-31	174
2010-03-31	178
2010-06-30	154
2010-09-30	180
2010-12-31	206
2011-03-31	200
2011-06-30	166
2011-09-30	156
2011-12-31	171
2012-03-31	214
2012-06-30	203
2012-09-30	211
2012-12-31	209
2013-03-31	203
2013-06-30	189
2013-09-30	207
2013-12-31	234
2014-03-31	263
2014-06-30	266
2014-09-30	284
2014-12-31	266
2015-03-31	273
2015-06-30	288
2015-09-30	271
2015-12-31	236
2016-03-31	184
2016-06-30	213
2016-09-30	222
2016-12-31	234
2017-03-31	203
2017-06-30	163
2017-09-30	147
2017-12-31	157
2018-03-31	140
2018-06-30	143
2018-09-30	131
2018-12-31	131
2019-03-31	153
2019-06-30	134
2019-09-30	141
2019-12-31	195
2020-03-31	222
2020-06-30	175
2020-09-30	164
2020-12-31	171
2021-03-31	192
2021-06-30	221
2021-09-30	218
2021-12-31	259
2022-03-31	337
2022-06-30	244
2022-09-30	220
2022-12-31	306
2023-03-31	314
2023-06-30	235
2023-09-30	249