Quarter	US dollars
2004-12-31	31961
2005-03-31	34239
2005-06-30	40243
2005-09-30	41516
2005-12-31	42819
2006-03-31	44625
2006-06-30	47752
2006-09-30	48951
2006-12-31	59307
2007-03-31	60520
2007-06-30	65314
2007-09-30	68506
2007-12-31	75425
2008-03-31	80349
2008-06-30	88975
2008-09-30	84725
2008-12-31	71446
2009-03-31	70157
2009-06-30	78027
2009-09-30	82849
2009-12-31	84110
2010-03-31	92761
2010-06-30	92486
2010-09-30	106184
2010-12-31	108070
2011-03-31	114435
2011-06-30	128637
2011-09-30	111941
2011-12-31	112706
2012-03-31	116057
2012-06-30	106164
2012-09-30	106357
2012-12-31	100204
2013-03-31	102475
2013-06-30	91769
2013-09-30	92900
2013-12-31	88360
2014-03-31	91431
2014-06-30	96656
2014-09-30	93089
2014-12-31	89392
2015-03-31	82045
2015-06-30	78308
2015-09-30	66224
2015-12-31	64679
2016-03-31	71549
2016-06-30	68808
2016-09-30	31229
2016-12-31	30771
2017-03-31	33519
2017-06-30	34896
2017-09-30	35652
2017-12-31	36757
2018-03-31	39400
2018-06-30	37198
2018-09-30	38625
2018-12-31	40309
2019-03-31	42013
2019-06-30	42023
2019-09-30	39047
2019-12-31	40999
2020-03-31	34763
2020-06-30	36988
2020-09-30	35334
2020-12-31	38620
2021-03-31	36450
2021-06-30	38737
2021-09-30	37723
2021-12-31	37511
2022-03-31	41034
2022-06-30	40165
2022-09-30	41494
2022-12-31	43156
2023-03-31	45163
2023-06-30	48563
2023-09-30	47993