Quarter	US dollars
2004-12-31	29230
2005-03-31	33572
2005-06-30	32150
2005-09-30	34193
2005-12-31	36235
2006-03-31	40102
2006-06-30	40612
2006-09-30	43933
2006-12-31	51314
2007-03-31	44592
2007-06-30	44010
2007-09-30	46677
2007-12-31	50143
2008-03-31	56827
2008-06-30	54861
2008-09-30	44586
2008-12-31	47403
2009-03-31	41885
2009-06-30	45065
2009-09-30	46701
2009-12-31	61048
2010-03-31	57571
2010-06-30	54815
2010-09-30	62708
2010-12-31	66473
2011-03-31	64800
2011-06-30	74267
2011-09-30	71998
2011-12-31	68379
2012-03-31	70908
2012-06-30	71329
2012-09-30	68355
2012-12-31	67008
2013-03-31	69746
2013-06-30	67228
2013-09-30	70028
2013-12-31	69347
2014-03-31	74243
2014-06-30	76442
2014-09-30	76676
2014-12-31	75956
2015-03-31	71831
2015-06-30	67569
2015-09-30	54246
2015-12-31	53781
2016-03-31	53966
2016-06-30	55627
2016-09-30	49435
2016-12-31	48206
2017-03-31	52598
2017-06-30	42079
2017-09-30	44055
2017-12-31	46047
2018-03-31	45485
2018-06-30	45548
2018-09-30	46597
2018-12-31	48494
2019-03-31	53785
2019-06-30	52979
2019-09-30	53290
2019-12-31	55302
2020-03-31	58495
2020-06-30	56383
2020-09-30	55775
2020-12-31	51305
2021-03-31	59464
2021-06-30	57983
2021-09-30	58337
2021-12-31	55401
2022-03-31	57390
2022-06-30	53047
2022-09-30	52616
2022-12-31	48731
2023-03-31	52761
2023-06-30	52750
2023-09-30	52368