Quarter	US dollars
2004-12-31	22975
2005-03-31	23698
2005-06-30	25592
2005-09-30	28860
2005-12-31	38732
2006-03-31	60959
2006-06-30	67300
2006-09-30	69785
2006-12-31	76415
2007-03-31	80394
2007-06-30	87018
2007-09-30	90888
2007-12-31	98866
2008-03-31	112294
2008-06-30	118240
2008-09-30	115243
2008-12-31	97091
2009-03-31	97421
2009-06-30	94355
2009-09-30	93850
2009-12-31	91868
2010-03-31	80182
2010-06-30	81380
2010-09-30	94415
2010-12-31	149123
2011-03-31	144091
2011-06-30	167893
2011-09-30	267314
2011-12-31	239421
2012-03-31	287222
2012-06-30	245241
2012-09-30	278347
2012-12-31	360611
2013-03-31	552490
2013-06-30	554257
2013-09-30	555057
2013-12-31	510429
2014-03-31	523572
2014-06-30	439608
2014-09-30	381133
2014-12-31	318072
2015-03-31	269556
2015-06-30	261625
2015-09-30	242434
2015-12-31	226261
2016-03-31	246131
2016-06-30	221549
2016-09-30	218696
2016-12-31	199293
2017-03-31	202172
2017-06-30	167041
2017-09-30	166582
2017-12-31	174617
2018-03-31	134668
2018-06-30	125510
2018-09-30	140193
2018-12-31	125620
2019-03-31	129153
2019-06-30	134355
2019-09-30	145810
2019-12-31	138038
2020-03-31	136517
2020-06-30	134657
2020-09-30	140682
2020-12-31	137815
2021-03-31	153214
2021-06-30	142063
2021-09-30	150910
2021-12-31	152073
2022-03-31	155483
2022-06-30	152159
2022-09-30	157930
2022-12-31	155536
2023-03-31	166070
2023-06-30	145042
2023-09-30	143677