Quarter	US dollars
1999-03-31	481
1999-06-30	790
1999-09-30	296
1999-12-31	414
2000-03-31	278
2000-06-30	106
2000-09-30	261
2000-12-31	213
2001-03-31	368
2001-06-30	298
2001-09-30	174
2001-12-31	134
2002-03-31	302
2002-06-30	692
2002-09-30	482
2002-12-31	524
2003-03-31	573
2003-06-30	1256
2003-09-30	508
2003-12-31	477
2004-03-31	765
2004-06-30	532
2004-09-30	359
2004-12-31	549
2005-03-31	511
2005-06-30	834
2005-09-30	479
2005-12-31	1283
2006-03-31	2193
2006-06-30	1401
2006-09-30	1877
2006-12-31	2730
2007-03-31	1944
2007-06-30	1144
2007-09-30	665
2007-12-31	910
2008-03-31	8317
2008-06-30	455
2008-09-30	753
2008-12-31	919
2009-03-31	1726
2009-06-30	1318
2009-09-30	2077
2009-12-31	1079
2010-03-31	1037
2010-06-30	1670
2010-09-30	1851
2010-12-31	656
2011-03-31	1569
2011-06-30	2587
2011-09-30	2545
2011-12-31	1763
2012-03-31	1606
2012-06-30	3998
2012-09-30	1983
2012-12-31	2814
2013-03-31	2455
2013-06-30	1535
2013-09-30	1149
2013-12-31	2331
2014-03-31	2619
2014-06-30	3182
2014-09-30	1709
2014-12-31	3059
2015-03-31	3485
2015-06-30	3675
2015-09-30	1273
2015-12-31	3421
2016-03-31	3512
2016-06-30	3390
2016-09-30	3693
2016-12-31	2923
2017-03-31	1794
2017-06-30	1555
2017-09-30	1537
2017-12-31	1240
2018-03-31	1603
2018-06-30	1911
2018-09-30	1794
2018-12-31	1752
2019-03-31	2104
2019-06-30	1427
2019-09-30	1676
2019-12-31	1904
2020-03-31	1852
2020-06-30	965
2020-09-30	1110
2020-12-31	1304
2021-03-31	571
2021-06-30	481
2021-09-30	510
2021-12-31	751
2022-03-31	993
2022-06-30	1053
2022-09-30	1213
2022-12-31	1106
2023-03-31	950
2023-06-30	1217
2023-09-30	1736