Quarter	US dollars
1999-03-31	69
1999-06-30	63
1999-09-30	70
1999-12-31	115
2000-03-31	113
2000-06-30	92
2000-09-30	22
2000-12-31	16
2001-03-31	7
2001-06-30	33
2001-09-30	57
2001-12-31	43
2002-03-31	135
2002-06-30	118
2002-09-30	116
2002-12-31	190
2003-03-31	137
2003-06-30	219
2003-09-30	296
2003-12-31	266
2004-03-31	217
2004-06-30	364
2004-09-30	484
2004-12-31	357
2005-03-31	154
2005-06-30	304
2005-09-30	413
2005-12-31	366
2006-03-31	655
2006-06-30	927
2006-09-30	878
2006-12-31	1301
2007-03-31	1350
2007-06-30	880
2007-09-30	1084
2007-12-31	1397
2008-03-31	1419
2008-06-30	1802
2008-09-30	1810
2008-12-31	1766
2009-03-31	1829
2009-06-30	1660
2009-09-30	1514
2009-12-31	1186
2010-03-31	1187
2010-06-30	1431
2010-09-30	1268
2010-12-31	1251
2011-03-31	1316
2011-06-30	1193
2011-09-30	1178
2011-12-31	1299
2012-03-31	1217
2012-06-30	1461
2012-09-30	1437
2012-12-31	1392
2013-03-31	1617
2013-06-30	1555
2013-09-30	1529
2013-12-31	1746
2014-03-31	1498
2014-06-30	1460
2014-09-30	1649
2014-12-31	1917
2015-03-31	1670
2015-06-30	1873
2015-09-30	1765
2015-12-31	1999
2016-03-31	1992
2016-06-30	2215
2016-09-30	2277
2016-12-31	2350
2017-03-31	2169
2017-06-30	2243
2017-09-30	2120
2017-12-31	2066
2018-03-31	2048
2018-06-30	1722
2018-09-30	1556
2018-12-31	1532
2019-03-31	1475
2019-06-30	1508
2019-09-30	1857
2019-12-31	1805
2020-03-31	1673
2020-06-30	1972
2020-09-30	1865
2020-12-31	1762
2021-03-31	1867
2021-06-30	1512
2021-09-30	1536
2021-12-31	1250
2022-03-31	1031
2022-06-30	766
2022-09-30	744
2022-12-31	463
2023-03-31	534
2023-06-30	485
2023-09-30	498