Quarter	US dollars
1999-03-31	318
1999-06-30	326
1999-09-30	319
1999-12-31	316
2000-03-31	328
2000-06-30	331
2000-09-30	271
2000-12-31	269
2001-03-31	268
2001-06-30	273
2001-09-30	301
2001-12-31	294
2002-03-31	295
2002-06-30	316
2002-09-30	308
2002-12-31	305
2003-03-31	296
2003-06-30	310
2003-09-30	323
2003-12-31	308
2004-03-31	343
2004-06-30	331
2004-09-30	329
2004-12-31	331
2005-03-31	340
2005-06-30	341
2005-09-30	312
2005-12-31	302
2006-03-31	307
2006-06-30	310
2006-09-30	322
2006-12-31	342
2007-03-31	310
2007-06-30	312
2007-09-30	308
2007-12-31	307
2008-03-31	299
2008-06-30	294
2008-09-30	268
2008-12-31	228
2009-03-31	235
2009-06-30	260
2009-09-30	260
2009-12-31	271
2010-03-31	271
2010-06-30	282
2010-09-30	269
2010-12-31	279
2011-03-31	293
2011-06-30	294
2011-09-30	297
2011-12-31	289
2012-03-31	366
2012-06-30	279
2012-09-30	263
2012-12-31	250
2013-03-31	293
2013-06-30	280
2013-09-30	270
2013-12-31	294
2014-03-31	293
2014-06-30	278
2014-09-30	273
2014-12-31	265
2015-03-31	273
2015-06-30	258
2015-09-30	247
2015-12-31	286
2016-03-31	288
2016-06-30	261
2016-09-30	243
2016-12-31	238
2017-03-31	219
2017-06-30	221
2017-09-30	222
2017-12-31	206
2018-03-31	204
2018-06-30	196
2018-09-30	183
2018-12-31	151
2019-03-31	160
2019-06-30	150
2019-09-30	155
2019-12-31	153
2020-03-31	172
2020-06-30	211
2020-09-30	258
2020-12-31	178
2021-03-31	156
2021-06-30	204
2021-09-30	190
2021-12-31	159
2022-03-31	147
2022-06-30	154
2022-09-30	152
2022-12-31	142
2023-03-31	127
2023-06-30	151
2023-09-30	164