Quarter	US dollars
2004-12-31	11414
2005-03-31	10265
2005-06-30	12142
2005-09-30	11082
2005-12-31	11508
2006-03-31	11389
2006-06-30	13181
2006-09-30	12855
2006-12-31	13382
2007-03-31	12941
2007-06-30	14733
2007-09-30	15547
2007-12-31	15404
2008-03-31	18041
2008-06-30	17869
2008-09-30	16279
2008-12-31	15837
2009-03-31	13569
2009-06-30	16547
2009-09-30	22048
2009-12-31	19294
2010-03-31	19564
2010-06-30	18834
2010-09-30	21252
2010-12-31	22903
2011-03-31	15887
2011-06-30	16544
2011-09-30	16833
2011-12-31	16924
2012-03-31	14923
2012-06-30	15733
2012-09-30	15902
2012-12-31	16073
2013-03-31	11286
2013-06-30	10990
2013-09-30	11365
2013-12-31	9165
2014-03-31	8882
2014-06-30	10292
2014-09-30	10192
2014-12-31	10386
2015-03-31	9547
2015-06-30	9875
2015-09-30	9271
2015-12-31	10299
2016-03-31	10684
2016-06-30	9998
2016-09-30	10003
2016-12-31	10012
2017-03-31	10842
2017-06-30	10430
2017-09-30	12029
2017-12-31	12462
2018-03-31	11400
2018-06-30	12651
2018-09-30	12645
2018-12-31	13531
2019-03-31	13761
2019-06-30	14638
2019-09-30	12999
2019-12-31	13610
2020-03-31	10939
2020-06-30	14618
2020-09-30	16075
2020-12-31	18433
2021-03-31	17328
2021-06-30	18703
2021-09-30	16584
2021-12-31	19410
2022-03-31	19552
2022-06-30	17462
2022-09-30	13980
2022-12-31	16499
2023-03-31	16869
2023-06-30	17493
2023-09-30	16637