Quarter	US dollars
2004-12-31	1565
2005-03-31	1446
2005-06-30	1801
2005-09-30	2172
2005-12-31	2019
2006-03-31	1996
2006-06-30	2047
2006-09-30	2759
2006-12-31	2372
2007-03-31	2473
2007-06-30	2859
2007-09-30	3376
2007-12-31	3410
2008-03-31	3848
2008-06-30	4647
2008-09-30	4265
2008-12-31	4168
2009-03-31	4605
2009-06-30	4456
2009-09-30	4420
2009-12-31	4615
2010-03-31	5011
2010-06-30	6039
2010-09-30	6004
2010-12-31	6746
2011-03-31	9801
2011-06-30	11013
2011-09-30	9327
2011-12-31	9399
2012-03-31	8475
2012-06-30	11261
2012-09-30	11387
2012-12-31	10456
2013-03-31	10158
2013-06-30	10620
2013-09-30	10741
2013-12-31	11879
2014-03-31	15002
2014-06-30	15452
2014-09-30	15079
2014-12-31	15510
2015-03-31	14002
2015-06-30	13791
2015-09-30	12398
2015-12-31	11058
2016-03-31	10510
2016-06-30	10013
2016-09-30	9437
2016-12-31	11343
2017-03-31	11305
2017-06-30	11452
2017-09-30	10350
2017-12-31	9854
2018-03-31	11973
2018-06-30	10429
2018-09-30	10300
2018-12-31	10098
2019-03-31	9289
2019-06-30	10426
2019-09-30	12114
2019-12-31	11881
2020-03-31	11457
2020-06-30	10946
2020-09-30	9216
2020-12-31	8709
2021-03-31	8391
2021-06-30	8735
2021-09-30	8711
2021-12-31	8981
2022-03-31	8587
2022-06-30	8412
2022-09-30	8431
2022-12-31	10068
2023-03-31	11340
2023-06-30	9970
2023-09-30	9687