Quarter	US dollars
2004-12-31	36459
2005-03-31	42976
2005-06-30	44780
2005-09-30	66028
2005-12-31	73179
2006-03-31	77024
2006-06-30	77288
2006-09-30	77852
2006-12-31	89562
2007-03-31	97077
2007-06-30	104680
2007-09-30	110496
2007-12-31	117449
2008-03-31	116573
2008-06-30	121338
2008-09-30	114961
2008-12-31	105691
2009-03-31	101292
2009-06-30	99852
2009-09-30	98056
2009-12-31	104310
2010-03-31	92473
2010-06-30	98101
2010-09-30	105185
2010-12-31	91615
2011-03-31	74152
2011-06-30	70449
2011-09-30	68722
2011-12-31	67364
2012-03-31	64541
2012-06-30	62942
2012-09-30	64546
2012-12-31	68158
2013-03-31	71109
2013-06-30	69171
2013-09-30	67163
2013-12-31	62996
2014-03-31	70780
2014-06-30	71486
2014-09-30	67377
2014-12-31	67665
2015-03-31	63603
2015-06-30	62782
2015-09-30	60487
2015-12-31	58608
2016-03-31	56214
2016-06-30	56545
2016-09-30	52034
2016-12-31	52918
2017-03-31	55556
2017-06-30	58247
2017-09-30	57414
2017-12-31	60534
2018-03-31	57699
2018-06-30	58652
2018-09-30	64446
2018-12-31	64192
2019-03-31	57157
2019-06-30	61298
2019-09-30	60565
2019-12-31	61069
2020-03-31	58223
2020-06-30	52810
2020-09-30	52656
2020-12-31	57499
2021-03-31	60035
2021-06-30	63393
2021-09-30	60331
2021-12-31	58733
2022-03-31	63625
2022-06-30	59678
2022-09-30	56087
2022-12-31	60961
2023-03-31	58145
2023-06-30	59963
2023-09-30	57949