Quarter	US dollars
2004-12-31	11663
2005-03-31	12554
2005-06-30	9308
2005-09-30	14272
2005-12-31	13853
2006-03-31	15815
2006-06-30	16682
2006-09-30	16491
2006-12-31	22273
2007-03-31	25638
2007-06-30	28878
2007-09-30	32077
2007-12-31	38148
2008-03-31	41167
2008-06-30	42708
2008-09-30	43549
2008-12-31	38878
2009-03-31	37266
2009-06-30	33279
2009-09-30	36853
2009-12-31	36275
2010-03-31	38423
2010-06-30	52885
2010-09-30	55848
2010-12-31	54398
2011-03-31	55483
2011-06-30	55894
2011-09-30	56454
2011-12-31	51638
2012-03-31	52515
2012-06-30	51908
2012-09-30	53135
2012-12-31	50750
2013-03-31	51283
2013-06-30	47869
2013-09-30	44684
2013-12-31	44450
2014-03-31	43675
2014-06-30	43031
2014-09-30	42553
2014-12-31	40787
2015-03-31	43217
2015-06-30	41079
2015-09-30	39238
2015-12-31	37560
2016-03-31	41985
2016-06-30	41780
2016-09-30	39467
2016-12-31	32842
2017-03-31	34701
2017-06-30	48835
2017-09-30	47709
2017-12-31	48926
2018-03-31	44489
2018-06-30	43158
2018-09-30	39003
2018-12-31	42960
2019-03-31	44267
2019-06-30	45317
2019-09-30	45207
2019-12-31	42766
2020-03-31	43011
2020-06-30	42336
2020-09-30	41536
2020-12-31	42522
2021-03-31	39215
2021-06-30	40117
2021-09-30	40944
2021-12-31	44296
2022-03-31	44036
2022-06-30	46768
2022-09-30	46916
2022-12-31	44452
2023-03-31	43690
2023-06-30	46315
2023-09-30	45895