Quarter	US dollars
2004-12-31	70247
2005-03-31	70584
2005-06-30	69513
2005-09-30	75850
2005-12-31	74264
2006-03-31	83455
2006-06-30	95092
2006-09-30	98613
2006-12-31	105107
2007-03-31	126500
2007-06-30	133476
2007-09-30	145258
2007-12-31	156554
2008-03-31	173568
2008-06-30	173915
2008-09-30	157379
2008-12-31	156627
2009-03-31	149203
2009-06-30	149373
2009-09-30	151351
2009-12-31	121727
2010-03-31	114393
2010-06-30	110747
2010-09-30	115902
2010-12-31	112415
2011-03-31	117141
2011-06-30	120272
2011-09-30	114459
2011-12-31	112250
2012-03-31	116826
2012-06-30	103946
2012-09-30	100608
2012-12-31	111024
2013-03-31	109022
2013-06-30	106196
2013-09-30	112006
2013-12-31	118367
2014-03-31	118282
2014-06-30	117790
2014-09-30	109421
2014-12-31	100686
2015-03-31	82869
2015-06-30	81954
2015-09-30	76345
2015-12-31	77671
2016-03-31	75405
2016-06-30	73706
2016-09-30	78758
2016-12-31	71936
2017-03-31	73743
2017-06-30	72421
2017-09-30	74362
2017-12-31	78773
2018-03-31	81650
2018-06-30	68682
2018-09-30	63214
2018-12-31	61267
2019-03-31	57542
2019-06-30	61507
2019-09-30	58361
2019-12-31	61988
2020-03-31	60992
2020-06-30	62947
2020-09-30	63706
2020-12-31	64971
2021-03-31	61785
2021-06-30	57414
2021-09-30	59215
2021-12-31	57477
2022-03-31	57647
2022-06-30	55443
2022-09-30	49264
2022-12-31	43331
2023-03-31	42220
2023-06-30	40335
2023-09-30	36041