Quarter	US dollars
1999-09-30	10
1999-12-31	19
2000-03-31	5
2000-06-30	3
2000-09-30	21
2000-12-31	4
2001-03-31	16
2001-06-30	4
2001-09-30	12
2001-12-31	19
2002-03-31	17
2002-06-30	18
2002-09-30	31
2002-12-31	43
2003-03-31	43
2003-06-30	33
2003-09-30	25
2003-12-31	59
2004-03-31	114
2004-06-30	60
2004-09-30	83
2004-12-31	96
2005-03-31	236
2005-06-30	914
2005-09-30	81
2005-12-31	153
2006-03-31	316
2006-06-30	584
2006-09-30	656
2006-12-31	667
2007-03-31	604
2007-06-30	736
2007-09-30	911
2007-12-31	872
2008-03-31	1993
2008-06-30	2185
2008-09-30	1825
2008-12-31	2500
2009-03-31	1531
2009-06-30	1008
2009-09-30	1056
2009-12-31	1213
2010-03-31	1192
2010-06-30	1279
2010-09-30	1478
2010-12-31	1483
2011-03-31	1114
2011-06-30	1235
2011-09-30	1636
2011-12-31	972
2012-03-31	1250
2012-06-30	905
2012-09-30	799
2012-12-31	635
2013-03-31	589
2013-06-30	651
2013-09-30	541
2013-12-31	544
2014-03-31	632
2014-06-30	573
2014-09-30	734
2014-12-31	799
2015-03-31	704
2015-06-30	648
2015-09-30	716
2015-12-31	550
2016-03-31	654
2016-06-30	485
2016-09-30	457
2016-12-31	342
2017-03-31	438
2017-06-30	303
2017-09-30	360
2017-12-31	550
2018-03-31	731
2018-06-30	735
2018-09-30	485
2018-12-31	432
2019-03-31	614
2019-06-30	748
2019-09-30	795
2019-12-31	917
2020-03-31	1184
2020-06-30	920
2020-09-30	671
2020-12-31	722
2021-03-31	487
2021-06-30	539
2021-09-30	550
2021-12-31	838
2022-03-31	908
2022-06-30	1309
2022-09-30	1431
2022-12-31	1125
2023-03-31	1417
2023-06-30	945
2023-09-30	1177