Quarter	US dollars
2004-12-31	14259
2005-03-31	15118
2005-06-30	16530
2005-09-30	19073
2005-12-31	18206
2006-03-31	23048
2006-06-30	21980
2006-09-30	25591
2006-12-31	26410
2007-03-31	29680
2007-06-30	33302
2007-09-30	42050
2007-12-31	49209
2008-03-31	54205
2008-06-30	57578
2008-09-30	58064
2008-12-31	48260
2009-03-31	49309
2009-06-30	49547
2009-09-30	47706
2009-12-31	50220
2010-03-31	52349
2010-06-30	57111
2010-09-30	57451
2010-12-31	56209
2011-03-31	55648
2011-06-30	59386
2011-09-30	58621
2011-12-31	55862
2012-03-31	56573
2012-06-30	59546
2012-09-30	61534
2012-12-31	59683
2013-03-31	55411
2013-06-30	55473
2013-09-30	58629
2013-12-31	55658
2014-03-31	59469
2014-06-30	59245
2014-09-30	57820
2014-12-31	57010
2015-03-31	55188
2015-06-30	55232
2015-09-30	55635
2015-12-31	53594
2016-03-31	53667
2016-06-30	53480
2016-09-30	50540
2016-12-31	47481
2017-03-31	47490
2017-06-30	49883
2017-09-30	48366
2017-12-31	49595
2018-03-31	50523
2018-06-30	46596
2018-09-30	47506
2018-12-31	47980
2019-03-31	51016
2019-06-30	52452
2019-09-30	53657
2019-12-31	53234
2020-03-31	54031
2020-06-30	54584
2020-09-30	51621
2020-12-31	52549
2021-03-31	52139
2021-06-30	52243
2021-09-30	49889
2021-12-31	53326
2022-03-31	55452
2022-06-30	53710
2022-09-30	50364
2022-12-31	52921
2023-03-31	53484
2023-06-30	52117
2023-09-30	51326