Quarter	US dollars
2004-12-31	4247
2005-03-31	3580
2005-06-30	3580
2005-09-30	3783
2005-12-31	3010
2006-03-31	3703
2006-06-30	4172
2006-09-30	6782
2006-12-31	5168
2007-03-31	6914
2007-06-30	7466
2007-09-30	11193
2007-12-31	13265
2008-03-31	18092
2008-06-30	26148
2008-09-30	20312
2008-12-31	19651
2009-03-31	17748
2009-06-30	23233
2009-09-30	22496
2009-12-31	24188
2010-03-31	24469
2010-06-30	22048
2010-09-30	24037
2010-12-31	23911
2011-03-31	26789
2011-06-30	26317
2011-09-30	25548
2011-12-31	25659
2012-03-31	24032
2012-06-30	23598
2012-09-30	21988
2012-12-31	21794
2013-03-31	20605
2013-06-30	18199
2013-09-30	27807
2013-12-31	28822
2014-03-31	16218
2014-06-30	14592
2014-09-30	13817
2014-12-31	13387
2015-03-31	12035
2015-06-30	13705
2015-09-30	13703
2015-12-31	11193
2016-03-31	14113
2016-06-30	14623
2016-09-30	16035
2016-12-31	15246
2017-03-31	13539
2017-06-30	13982
2017-09-30	15349
2017-12-31	12013
2018-03-31	18731
2018-06-30	19361
2018-09-30	19312
2018-12-31	18635
2019-03-31	18688
2019-06-30	16364
2019-09-30	15492
2019-12-31	15873
2020-03-31	16745
2020-06-30	19302
2020-09-30	17920
2020-12-31	18264
2021-03-31	18400
2021-06-30	16903
2021-09-30	15399
2021-12-31	19458
2022-03-31	16613
2022-06-30	16953
2022-09-30	16104
2022-12-31	28960
2023-03-31	19695
2023-06-30	21182
2023-09-30	25124