Quarter	US dollars
1999-03-31	149
1999-06-30	152
1999-09-30	137
1999-12-31	140
2000-03-31	200
2000-06-30	258
2000-09-30	197
2000-12-31	171
2001-03-31	136
2001-06-30	134
2001-09-30	148
2001-12-31	139
2002-03-31	165
2002-06-30	150
2002-09-30	150
2002-12-31	157
2003-03-31	142
2003-06-30	186
2003-09-30	205
2003-12-31	181
2004-03-31	256
2004-06-30	243
2004-09-30	252
2004-12-31	267
2005-03-31	271
2005-06-30	284
2005-09-30	293
2005-12-31	312
2006-03-31	290
2006-06-30	290
2006-09-30	271
2006-12-31	294
2007-03-31	308
2007-06-30	319
2007-09-30	367
2007-12-31	354
2008-03-31	426
2008-06-30	362
2008-09-30	394
2008-12-31	459
2009-03-31	595
2009-06-30	649
2009-09-30	478
2009-12-31	636
2010-03-31	462
2010-06-30	273
2010-09-30	307
2010-12-31	263
2011-03-31	277
2011-06-30	249
2011-09-30	202
2011-12-31	294
2012-03-31	334
2012-06-30	539
2012-09-30	495
2012-12-31	483
2013-03-31	482
2013-06-30	369
2013-09-30	296
2013-12-31	276
2014-03-31	167
2014-06-30	286
2014-09-30	149
2014-12-31	169
2015-03-31	214
2015-06-30	148
2015-09-30	282
2015-12-31	244
2016-03-31	252
2016-06-30	193
2016-09-30	230
2016-12-31	156
2017-03-31	252
2017-06-30	222
2017-09-30	238
2017-12-31	307
2018-03-31	207
2018-06-30	244
2018-09-30	222
2018-12-31	156
2019-03-31	191
2019-06-30	215
2019-09-30	174
2019-12-31	290
2020-03-31	306
2020-06-30	178
2020-09-30	339
2020-12-31	378
2021-03-31	224
2021-06-30	230
2021-09-30	363
2021-12-31	359
2022-03-31	412
2022-06-30	413
2022-09-30	447
2022-12-31	546
2023-03-31	530
2023-06-30	458
2023-09-30	405