Quarter	US dollars
1999-09-30	746
1999-12-31	698
2000-03-31	708
2000-06-30	730
2000-09-30	662
2000-12-31	683
2001-03-31	682
2001-06-30	708
2001-09-30	644
2001-12-31	725
2002-03-31	716
2002-06-30	664
2002-09-30	631
2002-12-31	618
2003-03-31	699
2003-06-30	678
2003-09-30	653
2003-12-31	684
2004-03-31	700
2004-06-30	809
2004-09-30	910
2004-12-31	891
2005-03-31	794
2005-06-30	907
2005-09-30	1125
2005-12-31	1276
2006-03-31	1785
2006-06-30	2142
2006-09-30	2335
2006-12-31	1479
2007-03-31	1332
2007-06-30	3343
2007-09-30	3423
2007-12-31	3211
2008-03-31	4476
2008-06-30	3714
2008-09-30	3511
2008-12-31	3526
2009-03-31	3181
2009-06-30	3351
2009-09-30	2712
2009-12-31	6178
2010-03-31	5493
2010-06-30	4311
2010-09-30	5117
2010-12-31	3660
2011-03-31	3280
2011-06-30	2616
2011-09-30	1907
2011-12-31	1654
2012-03-31	1704
2012-06-30	1889
2012-09-30	2183
2012-12-31	2433
2013-03-31	3253
2013-06-30	2231
2013-09-30	1974
2013-12-31	2116
2014-03-31	2091
2014-06-30	2048
2014-09-30	1733
2014-12-31	1345
2015-03-31	1308
2015-06-30	1324
2015-09-30	1180
2015-12-31	997
2016-03-31	1127
2016-06-30	1046
2016-09-30	1122
2016-12-31	1068
2017-03-31	922
2017-06-30	794
2017-09-30	812
2017-12-31	892
2018-03-31	995
2018-06-30	939
2018-09-30	1472
2018-12-31	1491
2019-03-31	1285
2019-06-30	1445
2019-09-30	1101
2019-12-31	1136
2020-03-31	1078
2020-06-30	1057
2020-09-30	1110
2020-12-31	1013
2021-03-31	1094
2021-06-30	1099
2021-09-30	1092
2021-12-31	1077
2022-03-31	1154
2022-06-30	905
2022-09-30	810
2022-12-31	747
2023-03-31	629
2023-06-30	705
2023-09-30	668