Quarter	US dollars
1999-03-31	184
1999-06-30	167
1999-09-30	162
1999-12-31	175
2000-03-31	253
2000-06-30	199
2000-09-30	209
2000-12-31	184
2001-03-31	263
2001-06-30	172
2001-09-30	198
2001-12-31	139
2002-03-31	164
2002-06-30	113
2002-09-30	119
2002-12-31	117
2003-03-31	109
2003-06-30	122
2003-09-30	104
2003-12-31	120
2004-03-31	162
2004-06-30	144
2004-09-30	143
2004-12-31	148
2005-03-31	156
2005-06-30	157
2005-09-30	141
2005-12-31	149
2006-03-31	168
2006-06-30	191
2006-09-30	210
2006-12-31	179
2007-03-31	191
2007-06-30	174
2007-09-30	228
2007-12-31	171
2008-03-31	205
2008-06-30	352
2008-09-30	339
2008-12-31	256
2009-03-31	187
2009-06-30	201
2009-09-30	288
2009-12-31	278
2010-03-31	267
2010-06-30	257
2010-09-30	291
2010-12-31	433
2011-03-31	310
2011-06-30	343
2011-09-30	150
2011-12-31	132
2012-03-31	276
2012-06-30	306
2012-09-30	232
2012-12-31	312
2013-03-31	272
2013-06-30	267
2013-09-30	270
2013-12-31	262
2014-03-31	454
2014-06-30	272
2014-09-30	267
2014-12-31	117
2015-03-31	98
2015-06-30	50
2015-09-30	6
2015-12-31	4
2016-03-31	2
2016-06-30	2
2016-09-30	10
2016-12-31	11
2017-03-31	7
2017-06-30	13
2017-09-30	9
2017-12-31	19
2018-03-31	34
2018-06-30	56
2018-09-30	37
2018-12-31	31
2019-03-31	44
2019-06-30	49
2019-09-30	60
2019-12-31	62
2020-03-31	69
2020-06-30	64
2020-09-30	60
2020-12-31	31
2021-03-31	145
2021-06-30	154
2021-09-30	224
2021-12-31	303
2022-03-31	320
2022-06-30	388
2022-09-30	390
2022-12-31	409
2023-03-31	444
2023-06-30	458
2023-09-30	475