Quarter	US dollars
2004-12-31	29447
2005-03-31	33084
2005-06-30	32837
2005-09-30	27379
2005-12-31	41809
2006-03-31	36232
2006-06-30	37892
2006-09-30	28965
2006-12-31	31020
2007-03-31	46191
2007-06-30	67868
2007-09-30	50089
2007-12-31	33296
2008-03-31	55670
2008-06-30	43886
2008-09-30	25931
2008-12-31	28099
2009-03-31	30058
2009-06-30	42287
2009-09-30	37707
2009-12-31	47409
2010-03-31	42777
2010-06-30	69907
2010-09-30	66054
2010-12-31	62545
2011-03-31	73517
2011-06-30	78159
2011-09-30	70210
2011-12-31	55537
2012-03-31	50169
2012-06-30	41891
2012-09-30	37609
2012-12-31	27972
2013-03-31	24939
2013-06-30	28930
2013-09-30	21590
2013-12-31	18911
2014-03-31	33941
2014-06-30	42648
2014-09-30	53607
2014-12-31	47261
2015-03-31	44643
2015-06-30	40674
2015-09-30	41321
2015-12-31	40994
2016-03-31	37475
2016-06-30	33758
2016-09-30	37402
2016-12-31	38428
2017-03-31	45659
2017-06-30	44278
2017-09-30	44171
2017-12-31	47001
2018-03-31	55750
2018-06-30	48161
2018-09-30	38238
2018-12-31	40782
2019-03-31	50607
2019-06-30	54690
2019-09-30	49117
2019-12-31	47816
2020-03-31	54352
2020-06-30	71230
2020-09-30	45427
2020-12-31	68856
2021-03-31	51237
2021-06-30	52648
2021-09-30	52864
2021-12-31	55389
2022-03-31	57118
2022-06-30	53460
2022-09-30	53052
2022-12-31	46936
2023-03-31	70462
2023-06-30	68504
2023-09-30	70794