Quarter	US dollars
2004-12-31	6856
2005-03-31	5756
2005-06-30	5410
2005-09-30	5326
2005-12-31	5895
2006-03-31	7531
2006-06-30	6384
2006-09-30	7213
2006-12-31	7172
2007-03-31	8196
2007-06-30	7319
2007-09-30	8783
2007-12-31	7778
2008-03-31	10786
2008-06-30	7849
2008-09-30	8312
2008-12-31	9093
2009-03-31	8475
2009-06-30	8828
2009-09-30	10026
2009-12-31	10748
2010-03-31	11629
2010-06-30	12278
2010-09-30	14178
2010-12-31	13463
2011-03-31	15480
2011-06-30	14139
2011-09-30	14006
2011-12-31	13256
2012-03-31	13637
2012-06-30	13026
2012-09-30	12386
2012-12-31	13793
2013-03-31	14446
2013-06-30	15695
2013-09-30	15180
2013-12-31	12609
2014-03-31	12706
2014-06-30	13493
2014-09-30	14155
2014-12-31	12038
2015-03-31	12369
2015-06-30	12170
2015-09-30	11045
2015-12-31	11363
2016-03-31	12650
2016-06-30	12642
2016-09-30	13146
2016-12-31	10824
2017-03-31	12946
2017-06-30	10997
2017-09-30	11377
2017-12-31	12125
2018-03-31	13173
2018-06-30	12277
2018-09-30	11172
2018-12-31	10840
2019-03-31	12384
2019-06-30	12179
2019-09-30	11690
2019-12-31	11925
2020-03-31	11149
2020-06-30	13049
2020-09-30	11146
2020-12-31	12845
2021-03-31	12063
2021-06-30	12075
2021-09-30	11607
2021-12-31	12761
2022-03-31	12975
2022-06-30	12271
2022-09-30	10788
2022-12-31	11263
2023-03-31	12611
2023-06-30	11774
2023-09-30	11882