Quarter	US dollars
1999-03-31	454
1999-06-30	615
1999-09-30	809
1999-12-31	765
2000-03-31	793
2000-06-30	841
2000-09-30	1036
2000-12-31	936
2001-03-31	1042
2001-06-30	1234
2001-09-30	1187
2001-12-31	958
2002-03-31	1274
2002-06-30	1491
2002-09-30	2053
2002-12-31	1761
2003-03-31	2177
2003-06-30	1819
2003-09-30	1604
2003-12-31	2116
2004-03-31	2076
2004-06-30	2124
2004-09-30	2490
2004-12-31	2359
2005-03-31	2616
2005-06-30	2646
2005-09-30	2400
2005-12-31	2085
2006-03-31	1903
2006-06-30	3360
2006-09-30	2040
2006-12-31	2512
2007-03-31	4132
2007-06-30	3728
2007-09-30	3126
2007-12-31	3441
2008-03-31	3309
2008-06-30	3118
2008-09-30	2389
2008-12-31	648
2009-03-31	555
2009-06-30	653
2009-09-30	951
2009-12-31	762
2010-03-31	628
2010-06-30	984
2010-09-30	947
2010-12-31	1483
2011-03-31	965
2011-06-30	895
2011-09-30	1083
2011-12-31	370
2012-03-31	299
2012-06-30	333
2012-09-30	433
2012-12-31	858
2013-03-31	404
2013-06-30	147
2013-09-30	379
2013-12-31	1094
2014-03-31	289
2014-06-30	631
2014-09-30	1204
2014-12-31	1094
2015-03-31	1006
2015-06-30	880
2015-09-30	491
2015-12-31	850
2016-03-31	908
2016-06-30	448
2016-09-30	1058
2016-12-31	958
2017-03-31	1237
2017-06-30	671
2017-09-30	1060
2017-12-31	1014
2018-03-31	1060
2018-06-30	731
2018-09-30	1350
2018-12-31	740
2019-03-31	1150
2019-06-30	1250
2019-09-30	983
2019-12-31	641
2020-03-31	245
2020-06-30	349
2020-09-30	1290
2020-12-31	256
2021-03-31	204
2021-06-30	44
2021-09-30	113
2021-12-31	89
2022-03-31	55
2022-06-30	56
2022-09-30	104
2022-12-31	126
2023-03-31	137
2023-06-30	226
2023-09-30	191