Quarter	US dollars
1999-09-30	420
1999-12-31	408
2000-03-31	407
2000-06-30	383
2000-09-30	451
2000-12-31	426
2001-03-31	532
2001-06-30	554
2001-09-30	660
2001-12-31	678
2002-03-31	564
2002-06-30	928
2002-09-30	953
2002-12-31	1173
2003-03-31	1307
2003-06-30	1624
2003-09-30	1725
2003-12-31	1950
2004-03-31	1805
2004-06-30	1373
2004-09-30	1362
2004-12-31	2073
2005-03-31	1796
2005-06-30	2112
2005-09-30	1900
2005-12-31	1775
2006-03-31	2045
2006-06-30	2058
2006-09-30	1592
2006-12-31	4846
2007-03-31	2375
2007-06-30	3864
2007-09-30	3657
2007-12-31	4738
2008-03-31	6897
2008-06-30	6673
2008-09-30	5467
2008-12-31	10356
2009-03-31	7272
2009-06-30	7511
2009-09-30	7864
2009-12-31	7414
2010-03-31	6839
2010-06-30	6698
2010-09-30	7104
2010-12-31	5860
2011-03-31	5554
2011-06-30	5860
2011-09-30	7458
2011-12-31	7018
2012-03-31	6781
2012-06-30	6811
2012-09-30	4677
2012-12-31	5020
2013-03-31	4576
2013-06-30	3758
2013-09-30	3647
2013-12-31	3719
2014-03-31	3651
2014-06-30	3987
2014-09-30	3983
2014-12-31	4381
2015-03-31	4078
2015-06-30	3287
2015-09-30	3138
2015-12-31	2936
2016-03-31	3189
2016-06-30	2988
2016-09-30	3028
2016-12-31	2319
2017-03-31	2099
2017-06-30	2077
2017-09-30	2062
2017-12-31	2017
2018-03-31	1882
2018-06-30	1205
2018-09-30	1019
2018-12-31	1125
2019-03-31	1238
2019-06-30	1326
2019-09-30	3919
2019-12-31	2964
2020-03-31	3916
2020-06-30	4072
2020-09-30	4159
2020-12-31	4112
2021-03-31	3035
2021-06-30	2920
2021-09-30	2855
2021-12-31	3492
2022-03-31	4446
2022-06-30	7131
2022-09-30	8989
2022-12-31	6622
2023-03-31	6135
2023-06-30	6058
2023-09-30	5840