Quarter	US dollars
2004-12-31	4210
2005-03-31	5836
2005-06-30	6191
2005-09-30	13636
2005-12-31	14426
2006-03-31	16363
2006-06-30	16081
2006-09-30	17165
2006-12-31	21834
2007-03-31	23041
2007-06-30	24404
2007-09-30	26763
2007-12-31	28804
2008-03-31	27581
2008-06-30	30054
2008-09-30	26110
2008-12-31	21067
2009-03-31	19752
2009-06-30	21397
2009-09-30	22203
2009-12-31	23775
2010-03-31	18249
2010-06-30	22395
2010-09-30	25263
2010-12-31	25067
2011-03-31	25651
2011-06-30	22067
2011-09-30	20951
2011-12-31	19707
2012-03-31	19222
2012-06-30	17843
2012-09-30	18097
2012-12-31	16183
2013-03-31	17325
2013-06-30	15983
2013-09-30	16647
2013-12-31	14809
2014-03-31	16331
2014-06-30	17446
2014-09-30	16703
2014-12-31	14509
2015-03-31	12598
2015-06-30	13928
2015-09-30	11662
2015-12-31	10673
2016-03-31	11031
2016-06-30	11275
2016-09-30	5243
2016-12-31	5765
2017-03-31	4545
2017-06-30	4422
2017-09-30	4484
2017-12-31	4680
2018-03-31	4691
2018-06-30	4694
2018-09-30	6652
2018-12-31	6180
2019-03-31	4059
2019-06-30	4011
2019-09-30	4691
2019-12-31	4524
2020-03-31	2954
2020-06-30	2167
2020-09-30	2680
2020-12-31	3734
2021-03-31	2915
2021-06-30	3864
2021-09-30	3406
2021-12-31	3811
2022-03-31	3558
2022-06-30	3622
2022-09-30	3331
2022-12-31	3896
2023-03-31	3315
2023-06-30	3585
2023-09-30	3973