Quarter	US dollars
2004-12-31	10836
2005-03-31	12089
2005-06-30	12576
2005-09-30	14686
2005-12-31	15218
2006-03-31	19251
2006-06-30	21007
2006-09-30	23244
2006-12-31	24537
2007-03-31	28423
2007-06-30	30943
2007-09-30	35394
2007-12-31	39296
2008-03-31	42163
2008-06-30	41555
2008-09-30	43227
2008-12-31	32825
2009-03-31	31170
2009-06-30	34822
2009-09-30	36723
2009-12-31	33100
2010-03-31	36404
2010-06-30	45443
2010-09-30	51109
2010-12-31	52170
2011-03-31	61148
2011-06-30	63815
2011-09-30	54765
2011-12-31	58965
2012-03-31	65046
2012-06-30	64488
2012-09-30	71942
2012-12-31	69645
2013-03-31	76541
2013-06-30	72011
2013-09-30	68880
2013-12-31	69679
2014-03-31	63788
2014-06-30	66689
2014-09-30	63031
2014-12-31	57767
2015-03-31	52211
2015-06-30	50271
2015-09-30	46572
2015-12-31	39241
2016-03-31	38921
2016-06-30	42198
2016-09-30	42453
2016-12-31	35737
2017-03-31	38086
2017-06-30	37012
2017-09-30	35768
2017-12-31	34890
2018-03-31	36094
2018-06-30	27149
2018-09-30	25083
2018-12-31	23120
2019-03-31	24294
2019-06-30	26148
2019-09-30	23303
2019-12-31	24025
2020-03-31	20078
2020-06-30	19929
2020-09-30	21593
2020-12-31	24968
2021-03-31	22670
2021-06-30	20733
2021-09-30	20737
2021-12-31	21319
2022-03-31	23481
2022-06-30	23945
2022-09-30	25090
2022-12-31	21092
2023-03-31	20320
2023-06-30	21412
2023-09-30	22940