Quarter	US dollars
2004-12-31	5817
2005-03-31	6000
2005-06-30	5716
2005-09-30	6090
2005-12-31	5651
2006-03-31	6007
2006-06-30	6948
2006-09-30	7622
2006-12-31	5851
2007-03-31	7198
2007-06-30	8315
2007-09-30	5931
2007-12-31	8133
2008-03-31	8989
2008-06-30	8601
2008-09-30	11206
2008-12-31	9416
2009-03-31	10358
2009-06-30	12361
2009-09-30	14171
2009-12-31	15297
2010-03-31	16632
2010-06-30	16048
2010-09-30	18994
2010-12-31	18817
2011-03-31	19845
2011-06-30	22281
2011-09-30	21434
2011-12-31	19755
2012-03-31	18476
2012-06-30	20552
2012-09-30	22575
2012-12-31	21867
2013-03-31	25644
2013-06-30	19379
2013-09-30	22359
2013-12-31	22767
2014-03-31	19571
2014-06-30	19764
2014-09-30	19111
2014-12-31	20830
2015-03-31	14684
2015-06-30	16257
2015-09-30	21300
2015-12-31	21774
2016-03-31	23159
2016-06-30	21676
2016-09-30	23072
2016-12-31	23363
2017-03-31	21701
2017-06-30	22474
2017-09-30	21848
2017-12-31	22641
2018-03-31	22823
2018-06-30	23905
2018-09-30	25869
2018-12-31	26004
2019-03-31	26081
2019-06-30	28399
2019-09-30	28473
2019-12-31	27981
2020-03-31	30221
2020-06-30	37668
2020-09-30	40367
2020-12-31	43868
2021-03-31	38140
2021-06-30	39105
2021-09-30	39953
2021-12-31	39571
2022-03-31	37133
2022-06-30	35559
2022-09-30	30383
2022-12-31	35418
2023-03-31	33677
2023-06-30	33398
2023-09-30	35571