Quarter	US dollars
2004-12-31	7409
2005-03-31	12715
2005-06-30	10090
2005-09-30	13556
2005-12-31	13889
2006-03-31	13704
2006-06-30	13290
2006-09-30	13853
2006-12-31	14987
2007-03-31	15139
2007-06-30	17787
2007-09-30	14555
2007-12-31	13546
2008-03-31	17701
2008-06-30	17527
2008-09-30	14120
2008-12-31	17808
2009-03-31	14471
2009-06-30	13397
2009-09-30	11179
2009-12-31	14670
2010-03-31	14712
2010-06-30	15611
2010-09-30	16995
2010-12-31	16815
2011-03-31	23147
2011-06-30	19233
2011-09-30	15852
2011-12-31	17857
2012-03-31	16082
2012-06-30	14516
2012-09-30	16033
2012-12-31	18084
2013-03-31	16022
2013-06-30	14961
2013-09-30	16630
2013-12-31	17736
2014-03-31	15794
2014-06-30	16919
2014-09-30	12470
2014-12-31	14302
2015-03-31	14745
2015-06-30	12689
2015-09-30	15827
2015-12-31	14401
2016-03-31	9241
2016-06-30	10187
2016-09-30	9383
2016-12-31	12628
2017-03-31	10337
2017-06-30	13603
2017-09-30	12187
2017-12-31	18178
2018-03-31	18060
2018-06-30	15776
2018-09-30	12808
2018-12-31	12980
2019-03-31	9851
2019-06-30	12825
2019-09-30	10431
2019-12-31	12489
2020-03-31	10388
2020-06-30	8852
2020-09-30	13021
2020-12-31	20834
2021-03-31	20293
2021-06-30	20365
2021-09-30	21403
2021-12-31	24225
2022-03-31	24084
2022-06-30	28966
2022-09-30	15593
2022-12-31	24630
2023-03-31	26695
2023-06-30	25000
2023-09-30	26978