Quarter	US dollars
2004-12-31	15419
2005-03-31	18501
2005-06-30	15539
2005-09-30	19922
2005-12-31	15976
2006-03-31	17536
2006-06-30	19084
2006-09-30	19274
2006-12-31	18950
2007-03-31	19148
2007-06-30	20648
2007-09-30	24543
2007-12-31	23801
2008-03-31	29592
2008-06-30	30060
2008-09-30	29002
2008-12-31	13692
2009-03-31	14580
2009-06-30	9448
2009-09-30	10560
2009-12-31	14648
2010-03-31	13820
2010-06-30	9878
2010-09-30	13455
2010-12-31	12117
2011-03-31	14129
2011-06-30	12543
2011-09-30	12230
2011-12-31	11093
2012-03-31	11577
2012-06-30	11812
2012-09-30	11719
2012-12-31	9439
2013-03-31	11270
2013-06-30	9460
2013-09-30	11138
2013-12-31	13907
2014-03-31	15846
2014-06-30	14794
2014-09-30	12383
2014-12-31	8460
2015-03-31	8031
2015-06-30	11553
2015-09-30	13472
2015-12-31	9872
2016-03-31	10036
2016-06-30	10620
2016-09-30	10456
2016-12-31	8902
2017-03-31	10278
2017-06-30	13393
2017-09-30	13413
2017-12-31	10830
2018-03-31	12322
2018-06-30	13253
2018-09-30	14125
2018-12-31	13344
2019-03-31	16577
2019-06-30	14876
2019-09-30	13017
2019-12-31	11189
2020-03-31	13080
2020-06-30	10904
2020-09-30	12719
2020-12-31	12852
2021-03-31	13498
2021-06-30	12745
2021-09-30	13371
2021-12-31	13171
2022-03-31	15365
2022-06-30	15780
2022-09-30	15321
2022-12-31	16811
2023-03-31	14460
2023-06-30	16384
2023-09-30	18355