Quarter	US dollars
2004-12-31	13435
2005-03-31	21265
2005-06-30	19698
2005-09-30	17999
2005-12-31	36835
2006-03-31	32766
2006-06-30	35379
2006-09-30	26332
2006-12-31	23731
2007-03-31	35194
2007-06-30	49277
2007-09-30	37282
2007-12-31	23274
2008-03-31	39802
2008-06-30	32275
2008-09-30	20307
2008-12-31	21869
2009-03-31	26710
2009-06-30	37405
2009-09-30	34201
2009-12-31	41350
2010-03-31	35984
2010-06-30	52446
2010-09-30	43317
2010-12-31	40382
2011-03-31	46038
2011-06-30	48730
2011-09-30	38422
2011-12-31	31723
2012-03-31	36635
2012-06-30	31582
2012-09-30	27258
2012-12-31	20991
2013-03-31	19664
2013-06-30	22103
2013-09-30	14641
2013-12-31	14444
2014-03-31	28189
2014-06-30	33926
2014-09-30	43589
2014-12-31	38524
2015-03-31	36843
2015-06-30	31568
2015-09-30	29323
2015-12-31	28799
2016-03-31	28513
2016-06-30	23575
2016-09-30	28507
2016-12-31	27978
2017-03-31	33235
2017-06-30	31272
2017-09-30	32985
2017-12-31	36554
2018-03-31	41706
2018-06-30	34915
2018-09-30	24675
2018-12-31	26068
2019-03-31	34626
2019-06-30	29419
2019-09-30	26330
2019-12-31	25351
2020-03-31	29128
2020-06-30	43444
2020-09-30	28022
2020-12-31	49147
2021-03-31	32312
2021-06-30	33927
2021-09-30	31644
2021-12-31	32930
2022-03-31	34449
2022-06-30	31305
2022-09-30	33905
2022-12-31	25784
2023-03-31	41386
2023-06-30	38756
2023-09-30	40735