Quarter	US dollars
1999-03-31	29
1999-06-30	28
1999-09-30	34
1999-12-31	36
2000-03-31	37
2000-06-30	36
2000-09-30	45
2000-12-31	43
2001-03-31	44
2001-06-30	42
2001-09-30	46
2001-12-31	42
2002-03-31	44
2002-06-30	48
2002-09-30	54
2002-12-31	67
2003-03-31	53
2003-06-30	69
2003-09-30	62
2003-12-31	94
2004-03-31	110
2004-06-30	109
2004-09-30	133
2004-12-31	169
2005-03-31	130
2005-06-30	130
2005-09-30	191
2005-12-31	223
2006-03-31	221
2006-06-30	237
2006-09-30	248
2006-12-31	239
2007-03-31	263
2007-06-30	275
2007-09-30	305
2007-12-31	252
2008-03-31	221
2008-06-30	380
2008-09-30	205
2008-12-31	91
2009-03-31	162
2009-06-30	138
2009-09-30	142
2009-12-31	114
2010-03-31	155
2010-06-30	300
2010-09-30	121
2010-12-31	124
2011-03-31	327
2011-06-30	248
2011-09-30	317
2011-12-31	128
2012-03-31	128
2012-06-30	140
2012-09-30	186
2012-12-31	136
2013-03-31	126
2013-06-30	121
2013-09-30	120
2013-12-31	150
2014-03-31	191
2014-06-30	164
2014-09-30	176
2014-12-31	149
2015-03-31	155
2015-06-30	163
2015-09-30	158
2015-12-31	149
2016-03-31	126
2016-06-30	117
2016-09-30	111
2016-12-31	95
2017-03-31	129
2017-06-30	107
2017-09-30	67
2017-12-31	68
2018-03-31	56
2018-06-30	53
2018-09-30	49
2018-12-31	48
2019-03-31	77
2019-06-30	49
2019-09-30	163
2019-12-31	91
2020-03-31	102
2020-06-30	70
2020-09-30	71
2020-12-31	90
2021-03-31	160
2021-06-30	159
2021-09-30	132
2021-12-31	126
2022-03-31	142
2022-06-30	125
2022-09-30	112
2022-12-31	123
2023-03-31	119
2023-06-30	124
2023-09-30	99