Quarter	US dollars
2004-12-31	5082
2005-03-31	7925
2005-06-30	5951
2005-09-30	5768
2005-12-31	7167
2006-03-31	9000
2006-06-30	7778
2006-09-30	7391
2006-12-31	9574
2007-03-31	8796
2007-06-30	10349
2007-09-30	9631
2007-12-31	10036
2008-03-31	11798
2008-06-30	9652
2008-09-30	9985
2008-12-31	6409
2009-03-31	7636
2009-06-30	9214
2009-09-30	8676
2009-12-31	6275
2010-03-31	6778
2010-06-30	4843
2010-09-30	5844
2010-12-31	3943
2011-03-31	8716
2011-06-30	8567
2011-09-30	7592
2011-12-31	6293
2012-03-31	7759
2012-06-30	8274
2012-09-30	9216
2012-12-31	10263
2013-03-31	10007
2013-06-30	10650
2013-09-30	10834
2013-12-31	11851
2014-03-31	12681
2014-06-30	11807
2014-09-30	12300
2014-12-31	12112
2015-03-31	12503
2015-06-30	10480
2015-09-30	12942
2015-12-31	9935
2016-03-31	10447
2016-06-30	8777
2016-09-30	9237
2016-12-31	7527
2017-03-31	7602
2017-06-30	6716
2017-09-30	5242
2017-12-31	4761
2018-03-31	6214
2018-06-30	5712
2018-09-30	6523
2018-12-31	8301
2019-03-31	9371
2019-06-30	8306
2019-09-30	7337
2019-12-31	6676
2020-03-31	7459
2020-06-30	7651
2020-09-30	7505
2020-12-31	8008
2021-03-31	8707
2021-06-30	9431
2021-09-30	8445
2021-12-31	5741
2022-03-31	7587
2022-06-30	6519
2022-09-30	5853
2022-12-31	5633
2023-03-31	6425
2023-06-30	7232
2023-09-30	6783