Quarter	US dollars
2004-12-31	8889
2005-03-31	10813
2005-06-30	9466
2005-09-30	10595
2005-12-31	12876
2006-03-31	12827
2006-06-30	14052
2006-09-30	13232
2006-12-31	15020
2007-03-31	16818
2007-06-30	17426
2007-09-30	21169
2007-12-31	18131
2008-03-31	19354
2008-06-30	16904
2008-09-30	13250
2008-12-31	22385
2009-03-31	22001
2009-06-30	22904
2009-09-30	15537
2009-12-31	13362
2010-03-31	10785
2010-06-30	13470
2010-09-30	15297
2010-12-31	16921
2011-03-31	22551
2011-06-30	22686
2011-09-30	24526
2011-12-31	23926
2012-03-31	19003
2012-06-30	13892
2012-09-30	13255
2012-12-31	17077
2013-03-31	15699
2013-06-30	16782
2013-09-30	13898
2013-12-31	14508
2014-03-31	18447
2014-06-30	13678
2014-09-30	13595
2014-12-31	13190
2015-03-31	12287
2015-06-30	14579
2015-09-30	14315
2015-12-31	15489
2016-03-31	14207
2016-06-30	14150
2016-09-30	14659
2016-12-31	14724
2017-03-31	15202
2017-06-30	16982
2017-09-30	17673
2017-12-31	18259
2018-03-31	19283
2018-06-30	20106
2018-09-30	21146
2018-12-31	38334
2019-03-31	23759
2019-06-30	22801
2019-09-30	21083
2019-12-31	19350
2020-03-31	18138
2020-06-30	22006
2020-09-30	25880
2020-12-31	27096
2021-03-31	28445
2021-06-30	26103
2021-09-30	27573
2021-12-31	25914
2022-03-31	24031
2022-06-30	23108
2022-09-30	22017
2022-12-31	23561
2023-03-31	22968
2023-06-30	24077
2023-09-30	22442