Quarter	US dollars
2004-12-31	30557
2005-03-31	30226
2005-06-30	29429
2005-09-30	30876
2005-12-31	30801
2006-03-31	30413
2006-06-30	32440
2006-09-30	34360
2006-12-31	37477
2007-03-31	37512
2007-06-30	39831
2007-09-30	45249
2007-12-31	43063
2008-03-31	53823
2008-06-30	56541
2008-09-30	59643
2008-12-31	55612
2009-03-31	53099
2009-06-30	56782
2009-09-30	60617
2009-12-31	60402
2010-03-31	64061
2010-06-30	67057
2010-09-30	72215
2010-12-31	76583
2011-03-31	86015
2011-06-30	89448
2011-09-30	86261
2011-12-31	87406
2012-03-31	88941
2012-06-30	90322
2012-09-30	95944
2012-12-31	97973
2013-03-31	98329
2013-06-30	94095
2013-09-30	102118
2013-12-31	105171
2014-03-31	111172
2014-06-30	110705
2014-09-30	111146
2014-12-31	103634
2015-03-31	100364
2015-06-30	105493
2015-09-30	101579
2015-12-31	88013
2016-03-31	91572
2016-06-30	95664
2016-09-30	95990
2016-12-31	90160
2017-03-31	94048
2017-06-30	102663
2017-09-30	105188
2017-12-31	108096
2018-03-31	108878
2018-06-30	108620
2018-09-30	111018
2018-12-31	115336
2019-03-31	123184
2019-06-30	122409
2019-09-30	117837
2019-12-31	122548
2020-03-31	124060
2020-06-30	131625
2020-09-30	136545
2020-12-31	143215
2021-03-31	142379
2021-06-30	143770
2021-09-30	147439
2021-12-31	150886
2022-03-31	152288
2022-06-30	149938
2022-09-30	145020
2022-12-31	153734
2023-03-31	158718
2023-06-30	157519
2023-09-30	156012