Quarter	US dollars
2004-12-31	50010
2005-03-31	51462
2005-06-30	51350
2005-09-30	55712
2005-12-31	58363
2006-03-31	62485
2006-06-30	70471
2006-09-30	71171
2006-12-31	80260
2007-03-31	83394
2007-06-30	90926
2007-09-30	100267
2007-12-31	103622
2008-03-31	110507
2008-06-30	111310
2008-09-30	103620
2008-12-31	115885
2009-03-31	109148
2009-06-30	111618
2009-09-30	118633
2009-12-31	94585
2010-03-31	94950
2010-06-30	88793
2010-09-30	96367
2010-12-31	51904
2011-03-31	54387
2011-06-30	54780
2011-09-30	51657
2011-12-31	48408
2012-03-31	48830
2012-06-30	47902
2012-09-30	46512
2012-12-31	57778
2013-03-31	54893
2013-06-30	54804
2013-09-30	56757
2013-12-31	58479
2014-03-31	59999
2014-06-30	59566
2014-09-30	51491
2014-12-31	48588
2015-03-31	38607
2015-06-30	39422
2015-09-30	42324
2015-12-31	34244
2016-03-31	35501
2016-06-30	34885
2016-09-30	37237
2016-12-31	31690
2017-03-31	33698
2017-06-30	35057
2017-09-30	34218
2017-12-31	33206
2018-03-31	33041
2018-06-30	32770
2018-09-30	32841
2018-12-31	31883
2019-03-31	30863
2019-06-30	32876
2019-09-30	31131
2019-12-31	33955
2020-03-31	31765
2020-06-30	33207
2020-09-30	34697
2020-12-31	39731
2021-03-31	40454
2021-06-30	39602
2021-09-30	39412
2021-12-31	34942
2022-03-31	34741
2022-06-30	30897
2022-09-30	21954
2022-12-31	16604
2023-03-31	12776
2023-06-30	11099
2023-09-30	5237