Quarter	US dollars
2004-12-31	1169
2005-03-31	1595
2005-06-30	1398
2005-09-30	1604
2005-12-31	1543
2006-03-31	1556
2006-06-30	1990
2006-09-30	1666
2006-12-31	1166
2007-03-31	1134
2007-06-30	1037
2007-09-30	1257
2007-12-31	1302
2008-03-31	2389
2008-06-30	2211
2008-09-30	2493
2008-12-31	2394
2009-03-31	1827
2009-06-30	1790
2009-09-30	1207
2009-12-31	1595
2010-03-31	1811
2010-06-30	2391
2010-09-30	2132
2010-12-31	4100
2011-03-31	6378
2011-06-30	5315
2011-09-30	4175
2011-12-31	7021
2012-03-31	7190
2012-06-30	9821
2012-09-30	8296
2012-12-31	8907
2013-03-31	11211
2013-06-30	13283
2013-09-30	12183
2013-12-31	14350
2014-03-31	13135
2014-06-30	14673
2014-09-30	13244
2014-12-31	12572
2015-03-31	11919
2015-06-30	10513
2015-09-30	9721
2015-12-31	9008
2016-03-31	8965
2016-06-30	7903
2016-09-30	8434
2016-12-31	7216
2017-03-31	6923
2017-06-30	9112
2017-09-30	6964
2017-12-31	6779
2018-03-31	7628
2018-06-30	7167
2018-09-30	6265
2018-12-31	5307
2019-03-31	5255
2019-06-30	5908
2019-09-30	5158
2019-12-31	4346
2020-03-31	3763
2020-06-30	3216
2020-09-30	4246
2020-12-31	4495
2021-03-31	5343
2021-06-30	5757
2021-09-30	5283
2021-12-31	4950
2022-03-31	4945
2022-06-30	5567
2022-09-30	4567
2022-12-31	4956
2023-03-31	5405
2023-06-30	5717
2023-09-30	5517