Quarter	US dollars
1999-03-31	282
1999-06-30	163
1999-09-30	193
1999-12-31	178
2000-03-31	200
2000-06-30	298
2000-09-30	309
2000-12-31	280
2001-03-31	245
2001-06-30	228
2001-09-30	184
2001-12-31	220
2002-03-31	164
2002-06-30	162
2002-09-30	197
2002-12-31	245
2003-03-31	228
2003-06-30	232
2003-09-30	190
2003-12-31	168
2004-03-31	170
2004-06-30	148
2004-09-30	128
2004-12-31	196
2005-03-31	215
2005-06-30	239
2005-09-30	289
2005-12-31	326
2006-03-31	296
2006-06-30	309
2006-09-30	402
2006-12-31	426
2007-03-31	355
2007-06-30	315
2007-09-30	470
2007-12-31	376
2008-03-31	554
2008-06-30	506
2008-09-30	486
2008-12-31	342
2009-03-31	263
2009-06-30	398
2009-09-30	265
2009-12-31	248
2010-03-31	290
2010-06-30	293
2010-09-30	276
2010-12-31	258
2011-03-31	427
2011-06-30	314
2011-09-30	168
2011-12-31	150
2012-03-31	277
2012-06-30	120
2012-09-30	163
2012-12-31	328
2013-03-31	152
2013-06-30	142
2013-09-30	186
2013-12-31	139
2014-03-31	141
2014-06-30	124
2014-09-30	123
2014-12-31	91
2015-03-31	100
2015-06-30	114
2015-09-30	147
2015-12-31	173
2016-03-31	162
2016-06-30	139
2016-09-30	471
2016-12-31	193
2017-03-31	153
2017-06-30	130
2017-09-30	154
2017-12-31	167
2018-03-31	169
2018-06-30	271
2018-09-30	366
2018-12-31	343
2019-03-31	332
2019-06-30	416
2019-09-30	168
2019-12-31	361
2020-03-31	354
2020-06-30	225
2020-09-30	113
2020-12-31	98
2021-03-31	125
2021-06-30	191
2021-09-30	183
2021-12-31	169
2022-03-31	230
2022-06-30	159
2022-09-30	193
2022-12-31	230
2023-03-31	524
2023-06-30	591
2023-09-30	795