Quarter	US dollars
2004-12-31	6055
2005-03-31	7972
2005-06-30	8294
2005-09-30	8848
2005-12-31	8380
2006-03-31	10828
2006-06-30	10545
2006-09-30	11402
2006-12-31	14564
2007-03-31	15406
2007-06-30	17496
2007-09-30	17801
2007-12-31	18376
2008-03-31	21109
2008-06-30	23222
2008-09-30	21759
2008-12-31	14051
2009-03-31	17730
2009-06-30	33573
2009-09-30	38669
2009-12-31	38943
2010-03-31	46858
2010-06-30	46237
2010-09-30	59343
2010-12-31	55265
2011-03-31	60701
2011-06-30	68917
2011-09-30	58681
2011-12-31	58851
2012-03-31	66436
2012-06-30	56525
2012-09-30	56922
2012-12-31	57080
2013-03-31	48887
2013-06-30	39398
2013-09-30	41989
2013-12-31	43102
2014-03-31	46659
2014-06-30	41818
2014-09-30	40269
2014-12-31	38279
2015-03-31	39049
2015-06-30	33476
2015-09-30	26066
2015-12-31	25527
2016-03-31	31021
2016-06-30	28747
2016-09-30	18217
2016-12-31	14335
2017-03-31	17391
2017-06-30	15749
2017-09-30	17305
2017-12-31	18083
2018-03-31	20659
2018-06-30	19630
2018-09-30	21454
2018-12-31	23946
2019-03-31	25121
2019-06-30	25620
2019-09-30	27594
2019-12-31	20762
2020-03-31	16134
2020-06-30	16550
2020-09-30	16764
2020-12-31	24197
2021-03-31	23097
2021-06-30	22917
2021-09-30	22406
2021-12-31	36108
2022-03-31	31333
2022-06-30	17309
2022-09-30	35998
2022-12-31	38707
2023-03-31	40941
2023-06-30	42430
2023-09-30	27938