Quarter	US dollars
2004-12-31	1254
2005-03-31	1268
2005-06-30	1789
2005-09-30	1976
2005-12-31	1372
2006-03-31	1592
2006-06-30	1150
2006-09-30	1564
2006-12-31	1051
2007-03-31	2220
2007-06-30	2980
2007-09-30	4558
2007-12-31	9769
2008-03-31	8147
2008-06-30	8697
2008-09-30	8032
2008-12-31	8437
2009-03-31	9288
2009-06-30	8927
2009-09-30	8299
2009-12-31	7743
2010-03-31	8242
2010-06-30	7206
2010-09-30	7080
2010-12-31	8991
2011-03-31	11479
2011-06-30	12655
2011-09-30	12652
2011-12-31	11710
2012-03-31	12943
2012-06-30	15306
2012-09-30	16569
2012-12-31	16050
2013-03-31	12788
2013-06-30	12667
2013-09-30	15412
2013-12-31	11427
2014-03-31	12585
2014-06-30	11144
2014-09-30	10638
2014-12-31	11021
2015-03-31	10296
2015-06-30	9648
2015-09-30	8087
2015-12-31	7698
2016-03-31	9356
2016-06-30	9257
2016-09-30	7817
2016-12-31	7269
2017-03-31	7054
2017-06-30	11540
2017-09-30	8196
2017-12-31	9325
2018-03-31	9486
2018-06-30	7740
2018-09-30	8498
2018-12-31	8697
2019-03-31	10616
2019-06-30	11624
2019-09-30	11470
2019-12-31	13536
2020-03-31	14484
2020-06-30	13461
2020-09-30	12193
2020-12-31	13700
2021-03-31	13018
2021-06-30	12924
2021-09-30	13333
2021-12-31	15009
2022-03-31	14943
2022-06-30	13018
2022-09-30	10743
2022-12-31	11251
2023-03-31	12669
2023-06-30	12502
2023-09-30	13055