Quarter	US dollars
2004-12-31	51734
2005-03-31	53211
2005-06-30	53325
2005-09-30	57031
2005-12-31	54698
2006-03-31	57719
2006-06-30	63436
2006-09-30	65910
2006-12-31	70176
2007-03-31	75439
2007-06-30	90499
2007-09-30	99537
2007-12-31	106348
2008-03-31	120548
2008-06-30	126270
2008-09-30	110103
2008-12-31	60095
2009-03-31	62728
2009-06-30	62331
2009-09-30	66929
2009-12-31	57445
2010-03-31	59703
2010-06-30	63360
2010-09-30	62732
2010-12-31	63570
2011-03-31	63553
2011-06-30	62042
2011-09-30	54472
2011-12-31	55245
2012-03-31	52835
2012-06-30	50423
2012-09-30	50109
2012-12-31	48367
2013-03-31	49015
2013-06-30	45020
2013-09-30	44504
2013-12-31	35203
2014-03-31	36117
2014-06-30	38355
2014-09-30	34794
2014-12-31	33549
2015-03-31	31678
2015-06-30	31230
2015-09-30	27652
2015-12-31	26782
2016-03-31	28299
2016-06-30	28585
2016-09-30	28435
2016-12-31	31050
2017-03-31	33998
2017-06-30	35070
2017-09-30	35153
2017-12-31	35766
2018-03-31	36543
2018-06-30	36774
2018-09-30	40222
2018-12-31	39844
2019-03-31	42435
2019-06-30	42414
2019-09-30	37724
2019-12-31	40206
2020-03-31	36965
2020-06-30	35914
2020-09-30	38196
2020-12-31	42009
2021-03-31	40076
2021-06-30	38852
2021-09-30	40494
2021-12-31	44444
2022-03-31	48705
2022-06-30	48382
2022-09-30	50049
2022-12-31	51346
2023-03-31	52935
2023-06-30	53276
2023-09-30	55051