Quarter	US dollars
1999-03-31	358
1999-06-30	338
1999-09-30	361
1999-12-31	372
2000-03-31	350
2000-06-30	385
2000-09-30	359
2000-12-31	391
2001-03-31	482
2001-06-30	502
2001-09-30	462
2001-12-31	503
2002-03-31	497
2002-06-30	535
2002-09-30	670
2002-12-31	779
2003-03-31	773
2003-06-30	705
2003-09-30	839
2003-12-31	880
2004-03-31	1045
2004-06-30	1050
2004-09-30	1029
2004-12-31	1099
2005-03-31	1270
2005-06-30	1111
2005-09-30	978
2005-12-31	726
2006-03-31	1082
2006-06-30	1126
2006-09-30	2993
2006-12-31	2816
2007-03-31	3121
2007-06-30	3418
2007-09-30	3832
2007-12-31	3667
2008-03-31	3627
2008-06-30	3907
2008-09-30	3833
2008-12-31	2988
2009-03-31	3165
2009-06-30	3570
2009-09-30	3199
2009-12-31	3795
2010-03-31	4598
2010-06-30	3114
2010-09-30	3171
2010-12-31	2918
2011-03-31	2811
2011-06-30	1938
2011-09-30	1965
2011-12-31	2484
2012-03-31	2133
2012-06-30	1985
2012-09-30	2210
2012-12-31	2028
2013-03-31	2026
2013-06-30	2257
2013-09-30	1924
2013-12-31	2212
2014-03-31	2492
2014-06-30	2598
2014-09-30	2693
2014-12-31	2128
2015-03-31	2168
2015-06-30	1731
2015-09-30	1871
2015-12-31	2431
2016-03-31	2404
2016-06-30	1805
2016-09-30	2289
2016-12-31	2193
2017-03-31	2182
2017-06-30	2560
2017-09-30	2754
2017-12-31	1796
2018-03-31	2934
2018-06-30	1811
2018-09-30	1370
2018-12-31	1663
2019-03-31	1743
2019-06-30	1849
2019-09-30	1685
2019-12-31	2080
2020-03-31	1966
2020-06-30	2243
2020-09-30	2664
2020-12-31	2160
2021-03-31	1649
2021-06-30	1779
2021-09-30	1672
2021-12-31	1574
2022-03-31	1588
2022-06-30	1630
2022-09-30	1991
2022-12-31	1628
2023-03-31	2212
2023-06-30	2398
2023-09-30	2868