Quarter	US dollars
2004-12-31	46494
2005-03-31	54822
2005-06-30	56179
2005-09-30	57838
2005-12-31	44089
2006-03-31	55759
2006-06-30	48025
2006-09-30	51163
2006-12-31	54209
2007-03-31	64219
2007-06-30	60631
2007-09-30	66931
2007-12-31	57039
2008-03-31	60021
2008-06-30	58125
2008-09-30	51868
2008-12-31	43500
2009-03-31	40578
2009-06-30	40228
2009-09-30	40953
2009-12-31	32995
2010-03-31	27355
2010-06-30	29539
2010-09-30	28992
2010-12-31	25010
2011-03-31	32488
2011-06-30	18355
2011-09-30	17833
2011-12-31	17743
2012-03-31	21418
2012-06-30	19951
2012-09-30	18768
2012-12-31	18016
2013-03-31	17349
2013-06-30	17134
2013-09-30	15673
2013-12-31	14917
2014-03-31	17185
2014-06-30	21929
2014-09-30	16267
2014-12-31	14303
2015-03-31	15249
2015-06-30	15399
2015-09-30	13139
2015-12-31	12919
2016-03-31	11461
2016-06-30	10818
2016-09-30	9620
2016-12-31	9215
2017-03-31	8722
2017-06-30	10427
2017-09-30	11082
2017-12-31	10326
2018-03-31	12929
2018-06-30	14255
2018-09-30	11763
2018-12-31	10330
2019-03-31	11371
2019-06-30	9237
2019-09-30	8872
2019-12-31	7210
2020-03-31	9694
2020-06-30	8662
2020-09-30	7421
2020-12-31	7477
2021-03-31	8129
2021-06-30	7822
2021-09-30	8337
2021-12-31	6738
2022-03-31	8829
2022-06-30	8055
2022-09-30	9305
2022-12-31	8047
2023-03-31	7675
2023-06-30	9903
2023-09-30	10494