Quarter	US dollars
2004-12-31	10031
2005-03-31	13976
2005-06-30	19293
2005-09-30	22303
2005-12-31	24389
2006-03-31	42977
2006-06-30	48401
2006-09-30	50511
2006-12-31	58385
2007-03-31	60575
2007-06-30	52879
2007-09-30	59869
2007-12-31	65196
2008-03-31	74827
2008-06-30	84585
2008-09-30	83390
2008-12-31	72915
2009-03-31	62602
2009-06-30	58002
2009-09-30	56431
2009-12-31	51709
2010-03-31	45604
2010-06-30	40917
2010-09-30	43334
2010-12-31	49876
2011-03-31	50048
2011-06-30	52892
2011-09-30	62045
2011-12-31	56062
2012-03-31	32729
2012-06-30	41344
2012-09-30	38867
2012-12-31	49114
2013-03-31	98922
2013-06-30	96677
2013-09-30	122087
2013-12-31	138665
2014-03-31	152375
2014-06-30	71843
2014-09-30	61884
2014-12-31	48884
2015-03-31	41346
2015-06-30	40005
2015-09-30	37966
2015-12-31	36106
2016-03-31	42829
2016-06-30	38134
2016-09-30	38343
2016-12-31	34172
2017-03-31	35065
2017-06-30	26320
2017-09-30	26085
2017-12-31	29352
2018-03-31	20849
2018-06-30	19690
2018-09-30	22371
2018-12-31	19769
2019-03-31	20714
2019-06-30	20885
2019-09-30	33083
2019-12-31	32338
2020-03-31	32651
2020-06-30	31423
2020-09-30	33617
2020-12-31	30855
2021-03-31	32946
2021-06-30	30229
2021-09-30	33516
2021-12-31	32458
2022-03-31	34444
2022-06-30	34389
2022-09-30	38312
2022-12-31	37033
2023-03-31	39794
2023-06-30	33940
2023-09-30	34272