Quarter	US dollars
2004-12-31	7319
2005-03-31	9800
2005-06-30	5931
2005-09-30	5637
2005-12-31	1555
2006-03-31	975
2006-06-30	1100
2006-09-30	2279
2006-12-31	2918
2007-03-31	3499
2007-06-30	6671
2007-09-30	6467
2007-12-31	5190
2008-03-31	5643
2008-06-30	5907
2008-09-30	5826
2008-12-31	4701
2009-03-31	7474
2009-06-30	5831
2009-09-30	8543
2009-12-31	5938
2010-03-31	5861
2010-06-30	4197
2010-09-30	4949
2010-12-31	4623
2011-03-31	4629
2011-06-30	4521
2011-09-30	5283
2011-12-31	3476
2012-03-31	5573
2012-06-30	5815
2012-09-30	6463
2012-12-31	7859
2013-03-31	7389
2013-06-30	8427
2013-09-30	6040
2013-12-31	5479
2014-03-31	8713
2014-06-30	11764
2014-09-30	7603
2014-12-31	5905
2015-03-31	7192
2015-06-30	7465
2015-09-30	7162
2015-12-31	6104
2016-03-31	5467
2016-06-30	4295
2016-09-30	5185
2016-12-31	3413
2017-03-31	2938
2017-06-30	4085
2017-09-30	4417
2017-12-31	3287
2018-03-31	6365
2018-06-30	6306
2018-09-30	4686
2018-12-31	5617
2019-03-31	5183
2019-06-30	3392
2019-09-30	2628
2019-12-31	3770
2020-03-31	2651
2020-06-30	4350
2020-09-30	3082
2020-12-31	3543
2021-03-31	3219
2021-06-30	3245
2021-09-30	3792
2021-12-31	3282
2022-03-31	3968
2022-06-30	3017
2022-09-30	2501
2022-12-31	1959
2023-03-31	1662
2023-06-30	3373
2023-09-30	3564