Quarter	US dollars
1999-03-31	288
1999-06-30	260
1999-09-30	237
1999-12-31	245
2000-03-31	182
2000-06-30	241
2000-09-30	227
2000-12-31	305
2001-03-31	353
2001-06-30	351
2001-09-30	338
2001-12-31	419
2002-03-31	447
2002-06-30	502
2002-09-30	482
2002-12-31	679
2003-03-31	635
2003-06-30	871
2003-09-30	863
2003-12-31	993
2004-03-31	976
2004-06-30	1018
2004-09-30	1202
2004-12-31	1638
2005-03-31	1686
2005-06-30	1482
2005-09-30	1374
2005-12-31	1341
2006-03-31	1499
2006-06-30	1318
2006-09-30	1339
2006-12-31	1507
2007-03-31	1515
2007-06-30	1728
2007-09-30	1289
2007-12-31	1869
2008-03-31	2263
2008-06-30	2419
2008-09-30	2627
2008-12-31	3308
2009-03-31	3601
2009-06-30	3904
2009-09-30	3081
2009-12-31	2896
2010-03-31	2460
2010-06-30	2174
2010-09-30	2420
2010-12-31	2666
2011-03-31	2788
2011-06-30	2709
2011-09-30	2232
2011-12-31	1871
2012-03-31	2106
2012-06-30	1886
2012-09-30	1599
2012-12-31	2140
2013-03-31	1984
2013-06-30	1520
2013-09-30	1304
2013-12-31	1076
2014-03-31	1416
2014-06-30	1128
2014-09-30	1288
2014-12-31	1237
2015-03-31	1161
2015-06-30	1177
2015-09-30	1160
2015-12-31	1009
2016-03-31	1327
2016-06-30	1179
2016-09-30	1055
2016-12-31	1106
2017-03-31	1041
2017-06-30	992
2017-09-30	577
2017-12-31	1062
2018-03-31	1280
2018-06-30	1713
2018-09-30	1353
2018-12-31	1452
2019-03-31	460
2019-06-30	380
2019-09-30	268
2019-12-31	441
2020-03-31	301
2020-06-30	467
2020-09-30	602
2020-12-31	515
2021-03-31	380
2021-06-30	175
2021-09-30	274
2021-12-31	206
2022-03-31	121
2022-06-30	236
2022-09-30	778
2022-12-31	804
2023-03-31	858
2023-06-30	1008
2023-09-30	793