Quarter	US dollars
2004-12-31	7424
2005-03-31	6762
2005-06-30	9029
2005-09-30	11082
2005-12-31	13058
2006-03-31	11857
2006-06-30	16824
2006-09-30	14987
2006-12-31	12223
2007-03-31	21011
2007-06-30	24944
2007-09-30	28625
2007-12-31	33433
2008-03-31	56344
2008-06-30	67480
2008-09-30	72423
2008-12-31	89850
2009-03-31	78464
2009-06-30	60879
2009-09-30	49665
2009-12-31	43990
2010-03-31	46861
2010-06-30	51598
2010-09-30	53321
2010-12-31	51244
2011-03-31	42927
2011-06-30	46692
2011-09-30	57367
2011-12-31	52022
2012-03-31	43753
2012-06-30	46084
2012-09-30	38325
2012-12-31	31963
2013-03-31	32041
2013-06-30	35535
2013-09-30	38415
2013-12-31	38137
2014-03-31	35935
2014-06-30	32807
2014-09-30	32776
2014-12-31	37042
2015-03-31	40676
2015-06-30	32869
2015-09-30	39402
2015-12-31	33402
2016-03-31	33298
2016-06-30	32916
2016-09-30	27002
2016-12-31	28842
2017-03-31	24270
2017-06-30	19294
2017-09-30	17858
2017-12-31	18796
2018-03-31	19270
2018-06-30	17027
2018-09-30	18287
2018-12-31	17305
2019-03-31	16833
2019-06-30	17823
2019-09-30	28219
2019-12-31	23338
2020-03-31	45287
2020-06-30	40072
2020-09-30	38061
2020-12-31	34625
2021-03-31	25200
2021-06-30	22918
2021-09-30	20849
2021-12-31	19546
2022-03-31	20529
2022-06-30	29678
2022-09-30	40857
2022-12-31	29181
2023-03-31	23919
2023-06-30	30061
2023-09-30	31612