Quarter	US dollars
2004-12-31	10982
2005-03-31	11802
2005-06-30	12639
2005-09-30	14789
2005-12-31	14282
2006-03-31	15643
2006-06-30	16312
2006-09-30	18094
2006-12-31	18126
2007-03-31	20972
2007-06-30	21499
2007-09-30	26810
2007-12-31	34253
2008-03-31	37605
2008-06-30	41153
2008-09-30	40309
2008-12-31	31508
2009-03-31	32089
2009-06-30	31223
2009-09-30	30336
2009-12-31	32267
2010-03-31	32397
2010-06-30	36771
2010-09-30	36805
2010-12-31	37538
2011-03-31	37919
2011-06-30	39992
2011-09-30	41513
2011-12-31	39203
2012-03-31	39030
2012-06-30	39276
2012-09-30	40660
2012-12-31	41044
2013-03-31	41083
2013-06-30	41131
2013-09-30	41620
2013-12-31	42237
2014-03-31	45561
2014-06-30	46141
2014-09-30	44885
2014-12-31	43707
2015-03-31	43205
2015-06-30	42915
2015-09-30	40877
2015-12-31	40159
2016-03-31	41007
2016-06-30	40100
2016-09-30	37982
2016-12-31	36625
2017-03-31	37446
2017-06-30	36653
2017-09-30	35562
2017-12-31	35443
2018-03-31	35126
2018-06-30	33668
2018-09-30	33331
2018-12-31	33010
2019-03-31	33825
2019-06-30	33770
2019-09-30	32908
2019-12-31	34153
2020-03-31	34064
2020-06-30	36251
2020-09-30	33754
2020-12-31	34775
2021-03-31	33617
2021-06-30	32628
2021-09-30	33216
2021-12-31	35009
2022-03-31	35265
2022-06-30	34801
2022-09-30	32749
2022-12-31	31575
2023-03-31	33200
2023-06-30	32483
2023-09-30	34071