Quarter	US dollars
2004-12-31	19251
2005-03-31	18938
2005-06-30	15238
2005-09-30	16427
2005-12-31	20757
2006-03-31	22110
2006-06-30	32341
2006-09-30	27144
2006-12-31	29134
2007-03-31	32930
2007-06-30	40579
2007-09-30	48345
2007-12-31	41795
2008-03-31	61970
2008-06-30	73192
2008-09-30	68639
2008-12-31	67666
2009-03-31	28165
2009-06-30	28511
2009-09-30	27148
2009-12-31	27699
2010-03-31	36304
2010-06-30	25551
2010-09-30	31727
2010-12-31	28107
2011-03-31	27607
2011-06-30	21806
2011-09-30	22334
2011-12-31	24359
2012-03-31	31687
2012-06-30	19703
2012-09-30	20663
2012-12-31	28228
2013-03-31	29653
2013-06-30	26630
2013-09-30	24489
2013-12-31	27774
2014-03-31	23662
2014-06-30	24845
2014-09-30	25691
2014-12-31	20528
2015-03-31	23920
2015-06-30	23296
2015-09-30	23922
2015-12-31	24444
2016-03-31	24489
2016-06-30	23366
2016-09-30	24053
2016-12-31	23331
2017-03-31	21950
2017-06-30	22747
2017-09-30	25077
2017-12-31	23995
2018-03-31	25424
2018-06-30	24449
2018-09-30	22583
2018-12-31	24192
2019-03-31	23536
2019-06-30	22572
2019-09-30	28285
2019-12-31	25036
2020-03-31	27710
2020-06-30	21948
2020-09-30	23900
2020-12-31	23760
2021-03-31	25502
2021-06-30	27801
2021-09-30	27296
2021-12-31	25524
2022-03-31	30404
2022-06-30	32902
2022-09-30	35361
2022-12-31	35410
2023-03-31	37139
2023-06-30	37638
2023-09-30	40041