Quarter	US dollars
2004-12-31	45400
2005-03-31	52442
2005-06-30	45705
2005-09-30	49903
2005-12-31	37458
2006-03-31	44604
2006-06-30	44360
2006-09-30	51637
2006-12-31	49612
2007-03-31	62389
2007-06-30	57905
2007-09-30	77497
2007-12-31	62990
2008-03-31	73152
2008-06-30	74762
2008-09-30	68532
2008-12-31	40336
2009-03-31	40289
2009-06-30	40669
2009-09-30	35135
2009-12-31	44725
2010-03-31	45600
2010-06-30	46729
2010-09-30	51691
2010-12-31	59653
2011-03-31	71673
2011-06-30	62928
2011-09-30	58889
2011-12-31	49427
2012-03-31	48606
2012-06-30	47620
2012-09-30	49182
2012-12-31	45558
2013-03-31	48405
2013-06-30	50972
2013-09-30	50856
2013-12-31	53428
2014-03-31	51258
2014-06-30	54107
2014-09-30	50666
2014-12-31	49727
2015-03-31	47356
2015-06-30	44662
2015-09-30	47763
2015-12-31	39094
2016-03-31	46120
2016-06-30	44247
2016-09-30	39602
2016-12-31	40857
2017-03-31	43496
2017-06-30	47190
2017-09-30	48448
2017-12-31	44055
2018-03-31	48091
2018-06-30	50091
2018-09-30	50885
2018-12-31	53765
2019-03-31	54141
2019-06-30	51767
2019-09-30	45346
2019-12-31	38478
2020-03-31	49161
2020-06-30	45880
2020-09-30	42402
2020-12-31	40138
2021-03-31	51089
2021-06-30	45524
2021-09-30	47813
2021-12-31	46033
2022-03-31	53506
2022-06-30	54370
2022-09-30	55598
2022-12-31	57140
2023-03-31	57505
2023-06-30	59217
2023-09-30	61900