Quarter	US dollars
1999-03-31	1336
1999-06-30	874
1999-09-30	1134
1999-12-31	608
2000-03-31	1132
2000-06-30	1541
2000-09-30	1124
2000-12-31	1815
2001-03-31	1164
2001-06-30	1319
2001-09-30	1099
2001-12-31	1013
2002-03-31	1152
2002-06-30	1582
2002-09-30	1541
2002-12-31	1741
2003-03-31	2140
2003-06-30	1973
2003-09-30	2007
2003-12-31	1888
2004-03-31	1950
2004-06-30	2202
2004-09-30	2365
2004-12-31	2472
2005-03-31	1928
2005-06-30	2826
2005-09-30	2599
2005-12-31	2496
2006-03-31	2156
2006-06-30	2187
2006-09-30	2103
2006-12-31	2009
2007-03-31	2810
2007-06-30	2770
2007-09-30	3773
2007-12-31	3813
2008-03-31	4936
2008-06-30	3584
2008-09-30	3906
2008-12-31	3377
2009-03-31	2509
2009-06-30	2808
2009-09-30	2682
2009-12-31	2251
2010-03-31	1814
2010-06-30	2354
2010-09-30	2047
2010-12-31	2278
2011-03-31	2105
2011-06-30	1985
2011-09-30	2221
2011-12-31	1702
2012-03-31	2120
2012-06-30	1805
2012-09-30	1599
2012-12-31	1429
2013-03-31	1457
2013-06-30	1462
2013-09-30	1559
2013-12-31	1299
2014-03-31	1536
2014-06-30	1298
2014-09-30	1571
2014-12-31	1451
2015-03-31	1761
2015-06-30	1775
2015-09-30	1505
2015-12-31	1384
2016-03-31	1312
2016-06-30	1452
2016-09-30	1491
2016-12-31	1454
2017-03-31	1297
2017-06-30	1402
2017-09-30	1700
2017-12-31	1454
2018-03-31	1445
2018-06-30	1756
2018-09-30	1339
2018-12-31	1334
2019-03-31	1624
2019-06-30	1734
2019-09-30	1454
2019-12-31	1584
2020-03-31	1050
2020-06-30	667
2020-09-30	433
2020-12-31	465
2021-03-31	359
2021-06-30	219
2021-09-30	235
2021-12-31	153
2022-03-31	258
2022-06-30	243
2022-09-30	209
2022-12-31	197
2023-03-31	141
2023-06-30	169
2023-09-30	170