Quarter	US dollars
1999-03-31	236
1999-06-30	199
1999-09-30	104
1999-12-31	108
2000-03-31	120
2000-06-30	113
2000-09-30	123
2000-12-31	103
2001-03-31	170
2001-06-30	226
2001-09-30	399
2001-12-31	344
2002-03-31	537
2002-06-30	770
2002-09-30	276
2002-12-31	454
2003-03-31	575
2003-06-30	442
2003-09-30	506
2003-12-31	698
2004-03-31	731
2004-06-30	785
2004-09-30	847
2004-12-31	830
2005-03-31	961
2005-06-30	184
2005-09-30	100
2005-12-31	104
2006-03-31	91
2006-06-30	88
2006-09-30	63
2006-12-31	213
2007-03-31	236
2007-06-30	263
2007-09-30	234
2007-12-31	322
2008-03-31	378
2008-06-30	379
2008-09-30	347
2008-12-31	104
2009-03-31	289
2009-06-30	343
2009-09-30	326
2009-12-31	305
2010-03-31	284
2010-06-30	262
2010-09-30	277
2010-12-31	337
2011-03-31	348
2011-06-30	400
2011-09-30	396
2011-12-31	478
2012-03-31	466
2012-06-30	478
2012-09-30	473
2012-12-31	489
2013-03-31	181
2013-06-30	86
2013-09-30	68
2013-12-31	109
2014-03-31	95
2014-06-30	87
2014-09-30	67
2014-12-31	127
2015-03-31	39
2015-06-30	76
2015-09-30	65
2015-12-31	33
2016-03-31	38
2016-06-30	56
2016-09-30	72
2016-12-31	100
2017-03-31	102
2017-06-30	221
2017-09-30	68
2017-12-31	475
2018-03-31	62
2018-06-30	719
2018-09-30	796
2018-12-31	249
2019-03-31	210
2019-06-30	217
2019-09-30	871
2019-12-31	910
2020-03-31	588
2020-06-30	1296
2020-09-30	934
2020-12-31	943
2021-03-31	877
2021-06-30	1226
2021-09-30	1109
2021-12-31	1109
2022-03-31	1232
2022-06-30	1075
2022-09-30	1109
2022-12-31	689
2023-03-31	971
2023-06-30	997
2023-09-30	888