Quarter	US dollars
2004-12-31	42533
2005-03-31	49568
2005-06-30	48218
2005-09-30	54345
2005-12-31	51288
2006-03-31	62079
2006-06-30	60088
2006-09-30	61632
2006-12-31	65411
2007-03-31	52749
2007-06-30	62531
2007-09-30	91579
2007-12-31	82985
2008-03-31	81086
2008-06-30	76611
2008-09-30	89577
2008-12-31	76871
2009-03-31	72247
2009-06-30	67968
2009-09-30	69047
2009-12-31	61130
2010-03-31	66055
2010-06-30	69784
2010-09-30	62075
2010-12-31	65588
2011-03-31	67887
2011-06-30	54557
2011-09-30	51020
2011-12-31	53591
2012-03-31	49554
2012-06-30	51866
2012-09-30	48835
2012-12-31	45605
2013-03-31	45039
2013-06-30	39917
2013-09-30	40422
2013-12-31	40647
2014-03-31	40652
2014-06-30	46911
2014-09-30	50526
2014-12-31	57046
2015-03-31	56816
2015-06-30	51871
2015-09-30	60028
2015-12-31	52327
2016-03-31	53393
2016-06-30	59551
2016-09-30	55456
2016-12-31	57386
2017-03-31	62240
2017-06-30	65271
2017-09-30	66405
2017-12-31	69256
2018-03-31	43883
2018-06-30	41146
2018-09-30	44765
2018-12-31	44404
2019-03-31	45030
2019-06-30	44474
2019-09-30	49266
2019-12-31	54152
2020-03-31	57858
2020-06-30	43615
2020-09-30	34514
2020-12-31	34142
2021-03-31	38465
2021-06-30	36070
2021-09-30	35038
2021-12-31	53112
2022-03-31	45460
2022-06-30	42126
2022-09-30	28795
2022-12-31	28216
2023-03-31	35888
2023-06-30	36095
2023-09-30	38528