Quarter	US dollars
2004-12-31	3623
2005-03-31	4148
2005-06-30	3827
2005-09-30	5505
2005-12-31	3804
2006-03-31	4981
2006-06-30	3921
2006-09-30	3798
2006-12-31	3922
2007-03-31	5333
2007-06-30	4009
2007-09-30	10440
2007-12-31	5744
2008-03-31	6408
2008-06-30	6729
2008-09-30	6567
2008-12-31	5644
2009-03-31	5085
2009-06-30	4254
2009-09-30	7758
2009-12-31	8663
2010-03-31	9874
2010-06-30	12800
2010-09-30	13923
2010-12-31	16349
2011-03-31	17840
2011-06-30	29024
2011-09-30	31001
2011-12-31	24512
2012-03-31	26314
2012-06-30	23592
2012-09-30	21850
2012-12-31	24792
2013-03-31	26239
2013-06-30	28776
2013-09-30	31667
2013-12-31	30995
2014-03-31	31519
2014-06-30	33093
2014-09-30	34940
2014-12-31	34698
2015-03-31	31884
2015-06-30	34296
2015-09-30	26206
2015-12-31	26037
2016-03-31	28069
2016-06-30	28895
2016-09-30	29479
2016-12-31	28875
2017-03-31	32549
2017-06-30	31281
2017-09-30	28832
2017-12-31	26305
2018-03-31	27724
2018-06-30	29534
2018-09-30	30348
2018-12-31	32552
2019-03-31	33527
2019-06-30	34445
2019-09-30	33063
2019-12-31	31528
2020-03-31	36187
2020-06-30	31471
2020-09-30	31820
2020-12-31	29539
2021-03-31	36397
2021-06-30	34937
2021-09-30	34920
2021-12-31	32721
2022-03-31	35913
2022-06-30	33501
2022-09-30	37328
2022-12-31	37096
2023-03-31	35968
2023-06-30	37734
2023-09-30	36789