Quarter	US dollars
2004-12-31	10216
2005-03-31	11760
2005-06-30	11217
2005-09-30	13563
2005-12-31	11855
2006-03-31	13295
2006-06-30	12213
2006-09-30	12793
2006-12-31	13811
2007-03-31	17001
2007-06-30	15997
2007-09-30	26089
2007-12-31	21621
2008-03-31	24887
2008-06-30	26458
2008-09-30	23616
2008-12-31	20034
2009-03-31	20532
2009-06-30	18699
2009-09-30	23673
2009-12-31	27016
2010-03-31	29809
2010-06-30	33376
2010-09-30	35805
2010-12-31	38480
2011-03-31	40004
2011-06-30	53213
2011-09-30	54670
2011-12-31	50443
2012-03-31	52911
2012-06-30	53935
2012-09-30	51137
2012-12-31	56074
2013-03-31	59689
2013-06-30	59773
2013-09-30	63840
2013-12-31	62023
2014-03-31	62512
2014-06-30	64389
2014-09-30	64581
2014-12-31	62641
2015-03-31	60709
2015-06-30	63794
2015-09-30	54104
2015-12-31	54950
2016-03-31	54195
2016-06-30	53148
2016-09-30	50261
2016-12-31	49125
2017-03-31	52928
2017-06-30	49446
2017-09-30	47514
2017-12-31	45082
2018-03-31	47573
2018-06-30	47939
2018-09-30	47674
2018-12-31	50362
2019-03-31	53572
2019-06-30	51331
2019-09-30	50899
2019-12-31	47051
2020-03-31	54230
2020-06-30	48717
2020-09-30	50405
2020-12-31	47452
2021-03-31	55569
2021-06-30	53818
2021-09-30	54007
2021-12-31	51451
2022-03-31	54263
2022-06-30	51337
2022-09-30	55478
2022-12-31	55145
2023-03-31	52557
2023-06-30	54658
2023-09-30	53833