Quarter	US dollars
2004-12-31	18322
2005-03-31	16080
2005-06-30	14508
2005-09-30	12668
2005-12-31	9685
2006-03-31	15676
2006-06-30	18786
2006-09-30	22190
2006-12-31	21120
2007-03-31	11232
2007-06-30	11240
2007-09-30	13822
2007-12-31	15037
2008-03-31	18673
2008-06-30	11787
2008-09-30	10618
2008-12-31	16668
2009-03-31	27309
2009-06-30	29866
2009-09-30	30278
2009-12-31	24009
2010-03-31	21774
2010-06-30	20377
2010-09-30	18353
2010-12-31	18797
2011-03-31	14765
2011-06-30	25516
2011-09-30	28429
2011-12-31	20305
2012-03-31	19240
2012-06-30	13579
2012-09-30	14965
2012-12-31	15114
2013-03-31	15598
2013-06-30	16368
2013-09-30	15515
2013-12-31	15120
2014-03-31	16396
2014-06-30	16307
2014-09-30	19816
2014-12-31	20450
2015-03-31	40656
2015-06-30	43426
2015-09-30	46413
2015-12-31	44076
2016-03-31	42343
2016-06-30	38671
2016-09-30	39650
2016-12-31	32744
2017-03-31	33370
2017-06-30	37697
2017-09-30	39642
2017-12-31	38763
2018-03-31	39236
2018-06-30	40961
2018-09-30	40177
2018-12-31	38599
2019-03-31	39485
2019-06-30	43837
2019-09-30	47361
2019-12-31	46121
2020-03-31	46934
2020-06-30	44045
2020-09-30	44103
2020-12-31	41887
2021-03-31	36891
2021-06-30	39446
2021-09-30	39079
2021-12-31	42068
2022-03-31	41751
2022-06-30	39251
2022-09-30	39536
2022-12-31	38569
2023-03-31	42948
2023-06-30	53470
2023-09-30	53767