Quarter	US dollars
2004-12-31	8764
2005-03-31	9915
2005-06-30	9979
2005-09-30	10804
2005-12-31	10332
2006-03-31	11193
2006-06-30	13628
2006-09-30	13509
2006-12-31	13263
2007-03-31	15359
2007-06-30	16557
2007-09-30	16837
2007-12-31	15772
2008-03-31	15467
2008-06-30	11803
2008-09-30	11650
2008-12-31	6151
2009-03-31	6529
2009-06-30	5905
2009-09-30	5676
2009-12-31	6044
2010-03-31	5903
2010-06-30	7897
2010-09-30	9439
2010-12-31	9795
2011-03-31	9600
2011-06-30	10469
2011-09-30	12075
2011-12-31	13258
2012-03-31	13763
2012-06-30	14006
2012-09-30	14663
2012-12-31	15681
2013-03-31	15822
2013-06-30	16576
2013-09-30	14235
2013-12-31	15700
2014-03-31	15664
2014-06-30	15098
2014-09-30	15129
2014-12-31	14967
2015-03-31	14557
2015-06-30	15402
2015-09-30	14696
2015-12-31	14250
2016-03-31	14228
2016-06-30	14382
2016-09-30	14195
2016-12-31	14413
2017-03-31	14572
2017-06-30	16186
2017-09-30	17142
2017-12-31	16785
2018-03-31	17155
2018-06-30	17073
2018-09-30	16211
2018-12-31	16813
2019-03-31	17898
2019-06-30	20319
2019-09-30	17546
2019-12-31	17816
2020-03-31	14440
2020-06-30	17397
2020-09-30	19488
2020-12-31	20689
2021-03-31	19654
2021-06-30	19978
2021-09-30	18830
2021-12-31	18908
2022-03-31	18069
2022-06-30	17667
2022-09-30	18610
2022-12-31	17948
2023-03-31	17013
2023-06-30	17454
2023-09-30	17286