Quarter	US dollars
1999-03-31	639
1999-06-30	905
1999-09-30	875
1999-12-31	902
2000-03-31	490
2000-06-30	445
2000-09-30	736
2000-12-31	869
2001-03-31	659
2001-06-30	723
2001-09-30	685
2001-12-31	306
2002-03-31	396
2002-06-30	742
2002-09-30	569
2002-12-31	538
2003-03-31	569
2003-06-30	635
2003-09-30	464
2003-12-31	628
2004-03-31	397
2004-06-30	471
2004-09-30	363
2004-12-31	510
2005-03-31	572
2005-06-30	853
2005-09-30	747
2005-12-31	717
2006-03-31	1386
2006-06-30	1554
2006-09-30	1569
2006-12-31	1239
2007-03-31	1694
2007-06-30	2251
2007-09-30	1618
2007-12-31	1265
2008-03-31	785
2008-06-30	523
2008-09-30	471
2008-12-31	436
2009-03-31	451
2009-06-30	474
2009-09-30	580
2009-12-31	539
2010-03-31	603
2010-06-30	604
2010-09-30	629
2010-12-31	559
2011-03-31	648
2011-06-30	929
2011-09-30	1301
2011-12-31	1138
2012-03-31	910
2012-06-30	863
2012-09-30	936
2012-12-31	1046
2013-03-31	1037
2013-06-30	404
2013-09-30	802
2013-12-31	434
2014-03-31	887
2014-06-30	972
2014-09-30	827
2014-12-31	881
2015-03-31	1276
2015-06-30	812
2015-09-30	1590
2015-12-31	895
2016-03-31	1328
2016-06-30	1474
2016-09-30	1613
2016-12-31	1989
2017-03-31	2722
2017-06-30	1558
2017-09-30	1780
2017-12-31	771
2018-03-31	3089
2018-06-30	2412
2018-09-30	1366
2018-12-31	1757
2019-03-31	1900
2019-06-30	1425
2019-09-30	1883
2019-12-31	3057
2020-03-31	2891
2020-06-30	3758
2020-09-30	2904
2020-12-31	2171
2021-03-31	3156
2021-06-30	2551
2021-09-30	2443
2021-12-31	1504
2022-03-31	2199
2022-06-30	1935
2022-09-30	1710
2022-12-31	2009
2023-03-31	1647
2023-06-30	2411
2023-09-30	2282