Quarter	US dollars
2004-12-31	2840
2005-03-31	2372
2005-06-30	3397
2005-09-30	3140
2005-12-31	2723
2006-03-31	2218
2006-06-30	3373
2006-09-30	2681
2006-12-31	2701
2007-03-31	3315
2007-06-30	3144
2007-09-30	3590
2007-12-31	3739
2008-03-31	5404
2008-06-30	5240
2008-09-30	4658
2008-12-31	10180
2009-03-31	10194
2009-06-30	8647
2009-09-30	10079
2009-12-31	9127
2010-03-31	9954
2010-06-30	11847
2010-09-30	15651
2010-12-31	10927
2011-03-31	9669
2011-06-30	9961
2011-09-30	17201
2011-12-31	17588
2012-03-31	17116
2012-06-30	11330
2012-09-30	9142
2012-12-31	6267
2013-03-31	5451
2013-06-30	4571
2013-09-30	4142
2013-12-31	4086
2014-03-31	2349
2014-06-30	4397
2014-09-30	4729
2014-12-31	4824
2015-03-31	4742
2015-06-30	3843
2015-09-30	4037
2015-12-31	3757
2016-03-31	4443
2016-06-30	4346
2016-09-30	4252
2016-12-31	3132
2017-03-31	2149
2017-06-30	2316
2017-09-30	2228
2017-12-31	2024
2018-03-31	1976
2018-06-30	1542
2018-09-30	2496
2018-12-31	3395
2019-03-31	3467
2019-06-30	3039
2019-09-30	3721
2019-12-31	2357
2020-03-31	2752
2020-06-30	2822
2020-09-30	2899
2020-12-31	2769
2021-03-31	2723
2021-06-30	2239
2021-09-30	1671
2021-12-31	1542
2022-03-31	1926
2022-06-30	2315
2022-09-30	3541
2022-12-31	2407
2023-03-31	2720
2023-06-30	1793
2023-09-30	2072