Quarter	US dollars
1999-09-30	56631
1999-12-31	55517
2000-03-31	55996
2000-06-30	68178
2000-09-30	77082
2000-12-31	86287
2001-03-31	106813
2001-06-30	91586
2001-09-30	116381
2001-12-31	122271
2002-03-31	96021
2002-06-30	158747
2002-09-30	205918
2002-12-31	228041
2003-03-31	233825
2003-06-30	278911
2003-09-30	262005
2003-12-31	257889
2004-03-31	268508
2004-06-30	208392
2004-09-30	241701
2004-12-31	269134
2005-03-31	252319
2005-06-30	328840
2005-09-30	307433
2005-12-31	274141
2006-03-31	281076
2006-06-30	344143
2006-09-30	273523
2006-12-31	262203
2007-03-31	338263
2007-06-30	466602
2007-09-30	523263
2007-12-31	662291
2008-03-31	1074520
2008-06-30	1118217
2008-09-30	1015057
2008-12-31	1948816
2009-03-31	1371187
2009-06-30	984073
2009-09-30	988833
2009-12-31	817336
2010-03-31	818307
2010-06-30	904637
2010-09-30	1064885
2010-12-31	887044
2011-03-31	701776
2011-06-30	752843
2011-09-30	1039035
2011-12-31	963791
2012-03-31	919039
2012-06-30	876935
2012-09-30	684401
2012-12-31	690311
2013-03-31	634270
2013-06-30	534112
2013-09-30	466693
2013-12-31	441521
2014-03-31	343334
2014-06-30	538364
2014-09-30	572334
2014-12-31	662906
2015-03-31	699459
2015-06-30	535409
2015-09-30	559444
2015-12-31	484217
2016-03-31	581615
2016-06-30	609385
2016-09-30	551973
2016-12-31	440783
2017-03-31	353008
2017-06-30	347436
2017-09-30	338279
2017-12-31	330934
2018-03-31	322045
2018-06-30	243935
2018-09-30	276327
2018-12-31	293479
2019-03-31	295419
2019-06-30	326091
2019-09-30	396312
2019-12-31	338933
2020-03-31	463204
2020-06-30	413968
2020-09-30	414440
2020-12-31	439844
2021-03-31	385199
2021-06-30	336504
2021-09-30	319286
2021-12-31	312119
2022-03-31	330106
2022-06-30	358989
2022-09-30	405283
2022-12-31	323641
2023-03-31	288521
2023-06-30	303494
2023-09-30	315088