Quarter	US dollars
2004-12-31	5800
2005-03-31	7004
2005-06-30	6819
2005-09-30	8446
2005-12-31	9050
2006-03-31	12093
2006-06-30	13460
2006-09-30	15749
2006-12-31	16188
2007-03-31	19911
2007-06-30	21314
2007-09-30	24897
2007-12-31	26969
2008-03-31	29008
2008-06-30	27328
2008-09-30	28385
2008-12-31	21128
2009-03-31	19846
2009-06-30	23085
2009-09-30	23826
2009-12-31	20886
2010-03-31	22690
2010-06-30	27169
2010-09-30	30648
2010-12-31	30277
2011-03-31	36819
2011-06-30	37388
2011-09-30	32850
2011-12-31	36349
2012-03-31	39646
2012-06-30	39868
2012-09-30	47076
2012-12-31	46013
2013-03-31	52371
2013-06-30	45998
2013-09-30	42587
2013-12-31	43672
2014-03-31	40099
2014-06-30	41286
2014-09-30	39653
2014-12-31	34311
2015-03-31	32221
2015-06-30	30245
2015-09-30	28252
2015-12-31	23521
2016-03-31	23938
2016-06-30	29971
2016-09-30	28658
2016-12-31	26262
2017-03-31	27111
2017-06-30	25868
2017-09-30	24276
2017-12-31	23229
2018-03-31	25160
2018-06-30	17196
2018-09-30	15651
2018-12-31	14520
2019-03-31	16345
2019-06-30	17047
2019-09-30	14694
2019-12-31	14083
2020-03-31	13012
2020-06-30	12228
2020-09-30	12686
2020-12-31	14804
2021-03-31	14675
2021-06-30	12951
2021-09-30	13719
2021-12-31	12594
2022-03-31	16880
2022-06-30	17579
2022-09-30	19405
2022-12-31	13738
2023-03-31	13140
2023-06-30	14913
2023-09-30	16723