Quarter	US dollars
2004-12-31	6658
2005-03-31	7027
2005-06-30	7751
2005-09-30	10783
2005-12-31	9582
2006-03-31	9751
2006-06-30	10144
2006-09-30	10583
2006-12-31	12769
2007-03-31	13992
2007-06-30	15204
2007-09-30	19516
2007-12-31	21804
2008-03-31	20119
2008-06-30	21730
2008-09-30	19149
2008-12-31	22845
2009-03-31	19940
2009-06-30	20325
2009-09-30	20856
2009-12-31	23219
2010-03-31	25317
2010-06-30	30965
2010-09-30	35343
2010-12-31	42502
2011-03-31	44895
2011-06-30	51222
2011-09-30	52559
2011-12-31	52475
2012-03-31	53169
2012-06-30	55481
2012-09-30	55708
2012-12-31	59167
2013-03-31	62757
2013-06-30	63275
2013-09-30	72306
2013-12-31	77457
2014-03-31	84837
2014-06-30	84139
2014-09-30	86601
2014-12-31	90854
2015-03-31	86650
2015-06-30	84921
2015-09-30	79164
2015-12-31	74909
2016-03-31	71799
2016-06-30	71687
2016-09-30	70561
2016-12-31	69438
2017-03-31	73366
2017-06-30	77491
2017-09-30	79714
2017-12-31	81856
2018-03-31	87261
2018-06-30	83659
2018-09-30	84245
2018-12-31	84173
2019-03-31	94087
2019-06-30	97232
2019-09-30	98226
2019-12-31	104684
2020-03-31	100793
2020-06-30	101750
2020-09-30	102768
2020-12-31	110718
2021-03-31	118781
2021-06-30	131108
2021-09-30	128875
2021-12-31	131240
2022-03-31	130300
2022-06-30	129370
2022-09-30	123000
2022-12-31	124399
2023-03-31	125659
2023-06-30	122104
2023-09-30	119320