Quarter	US dollars
1999-03-31	77
1999-06-30	28
1999-09-30	48
1999-12-31	45
2000-03-31	33
2000-06-30	31
2000-09-30	39
2000-12-31	82
2001-03-31	73
2001-06-30	90
2001-09-30	73
2001-12-31	97
2002-03-31	61
2002-06-30	92
2002-09-30	73
2002-12-31	100
2003-03-31	95
2003-06-30	82
2003-09-30	98
2003-12-31	104
2004-03-31	160
2004-06-30	148
2004-09-30	259
2004-12-31	116
2005-03-31	145
2005-06-30	93
2005-09-30	133
2005-12-31	93
2006-03-31	160
2006-06-30	127
2006-09-30	145
2006-12-31	857
2007-03-31	194
2007-06-30	164
2007-09-30	243
2007-12-31	266
2008-03-31	294
2008-06-30	364
2008-09-30	240
2008-12-31	168
2009-03-31	501
2009-06-30	823
2009-09-30	548
2009-12-31	216
2010-03-31	442
2010-06-30	237
2010-09-30	300
2010-12-31	344
2011-03-31	255
2011-06-30	223
2011-09-30	340
2011-12-31	309
2012-03-31	337
2012-06-30	559
2012-09-30	329
2012-12-31	469
2013-03-31	520
2013-06-30	387
2013-09-30	587
2013-12-31	692
2014-03-31	919
2014-06-30	595
2014-09-30	703
2014-12-31	843
2015-03-31	1110
2015-06-30	782
2015-09-30	1033
2015-12-31	750
2016-03-31	829
2016-06-30	891
2016-09-30	863
2016-12-31	1100
2017-03-31	1217
2017-06-30	1160
2017-09-30	1220
2017-12-31	1260
2018-03-31	1184
2018-06-30	1146
2018-09-30	1025
2018-12-31	974
2019-03-31	892
2019-06-30	950
2019-09-30	962
2019-12-31	1352
2020-03-31	1045
2020-06-30	1370
2020-09-30	1475
2020-12-31	1323
2021-03-31	1232
2021-06-30	1161
2021-09-30	940
2021-12-31	1009
2022-03-31	830
2022-06-30	742
2022-09-30	668
2022-12-31	798
2023-03-31	825
2023-06-30	854
2023-09-30	847