Quarter	US dollars
2004-12-31	24692
2005-03-31	23677
2005-06-30	24421
2005-09-30	31106
2005-12-31	29398
2006-03-31	31674
2006-06-30	31787
2006-09-30	39985
2006-12-31	37273
2007-03-31	41886
2007-06-30	47335
2007-09-30	50896
2007-12-31	59659
2008-03-31	67738
2008-06-30	73413
2008-09-30	63284
2008-12-31	60877
2009-03-31	66357
2009-06-30	55092
2009-09-30	55555
2009-12-31	45523
2010-03-31	28221
2010-06-30	37701
2010-09-30	52798
2010-12-31	47165
2011-03-31	66799
2011-06-30	65966
2011-09-30	69933
2011-12-31	64513
2012-03-31	68811
2012-06-30	71828
2012-09-30	67265
2012-12-31	74861
2013-03-31	71287
2013-06-30	70636
2013-09-30	80993
2013-12-31	77541
2014-03-31	58829
2014-06-30	49535
2014-09-30	45643
2014-12-31	42536
2015-03-31	34764
2015-06-30	32306
2015-09-30	33384
2015-12-31	30643
2016-03-31	35055
2016-06-30	34022
2016-09-30	33923
2016-12-31	35431
2017-03-31	40027
2017-06-30	38467
2017-09-30	37382
2017-12-31	36318
2018-03-31	38202
2018-06-30	35898
2018-09-30	33630
2018-12-31	31221
2019-03-31	31619
2019-06-30	37322
2019-09-30	37167
2019-12-31	33412
2020-03-31	30452
2020-06-30	33673
2020-09-30	29260
2020-12-31	34885
2021-03-31	32397
2021-06-30	36077
2021-09-30	33655
2021-12-31	33327
2022-03-31	25028
2022-06-30	18817
2022-09-30	13334
2022-12-31	17029
2023-03-31	20795
2023-06-30	25745
2023-09-30	26570