Quarter	US dollars
2004-12-31	35864
2005-03-31	36640
2005-06-30	38632
2005-09-30	41738
2005-12-31	43274
2006-03-31	45879
2006-06-30	50428
2006-09-30	52459
2006-12-31	52207
2007-03-31	55254
2007-06-30	61249
2007-09-30	63251
2007-12-31	74243
2008-03-31	73981
2008-06-30	71968
2008-09-30	70878
2008-12-31	58443
2009-03-31	56911
2009-06-30	60141
2009-09-30	64952
2009-12-31	68128
2010-03-31	70904
2010-06-30	66826
2010-09-30	66409
2010-12-31	69173
2011-03-31	71773
2011-06-30	73972
2011-09-30	66158
2011-12-31	70699
2012-03-31	69249
2012-06-30	72131
2012-09-30	74426
2012-12-31	72313
2013-03-31	73622
2013-06-30	69202
2013-09-30	72740
2013-12-31	67277
2014-03-31	65458
2014-06-30	65882
2014-09-30	62560
2014-12-31	61669
2015-03-31	54640
2015-06-30	54867
2015-09-30	53592
2015-12-31	53495
2016-03-31	57246
2016-06-30	58635
2016-09-30	56360
2016-12-31	54193
2017-03-31	54816
2017-06-30	56135
2017-09-30	57238
2017-12-31	59014
2018-03-31	56992
2018-06-30	57400
2018-09-30	59999
2018-12-31	57379
2019-03-31	59606
2019-06-30	62730
2019-09-30	63258
2019-12-31	62827
2020-03-31	62997
2020-06-30	72002
2020-09-30	72791
2020-12-31	75202
2021-03-31	72592
2021-06-30	74513
2021-09-30	79182
2021-12-31	77866
2022-03-31	79755
2022-06-30	80070
2022-09-30	74492
2022-12-31	76149
2023-03-31	71302
2023-06-30	71283
2023-09-30	69442