Quarter	US dollars
2004-12-31	6426
2005-03-31	7590
2005-06-30	7944
2005-09-30	7578
2005-12-31	7601
2006-03-31	7528
2006-06-30	8888
2006-09-30	10662
2006-12-31	12129
2007-03-31	12321
2007-06-30	13509
2007-09-30	15148
2007-12-31	13592
2008-03-31	16051
2008-06-30	16858
2008-09-30	18448
2008-12-31	10027
2009-03-31	10550
2009-06-30	10273
2009-09-30	10950
2009-12-31	10210
2010-03-31	11204
2010-06-30	7714
2010-09-30	8840
2010-12-31	8734
2011-03-31	10888
2011-06-30	10163
2011-09-30	9444
2011-12-31	7577
2012-03-31	7818
2012-06-30	9296
2012-09-30	7913
2012-12-31	8997
2013-03-31	10832
2013-06-30	8207
2013-09-30	10065
2013-12-31	12806
2014-03-31	12213
2014-06-30	12893
2014-09-30	9727
2014-12-31	7965
2015-03-31	8632
2015-06-30	11208
2015-09-30	13555
2015-12-31	9597
2016-03-31	10395
2016-06-30	10062
2016-09-30	9312
2016-12-31	6724
2017-03-31	6726
2017-06-30	9717
2017-09-30	8847
2017-12-31	7179
2018-03-31	8084
2018-06-30	9981
2018-09-30	10162
2018-12-31	9971
2019-03-31	12853
2019-06-30	13153
2019-09-30	11040
2019-12-31	9946
2020-03-31	10926
2020-06-30	9315
2020-09-30	8840
2020-12-31	7211
2021-03-31	8073
2021-06-30	7671
2021-09-30	7121
2021-12-31	7303
2022-03-31	9989
2022-06-30	9479
2022-09-30	8095
2022-12-31	9003
2023-03-31	9437
2023-06-30	11935
2023-09-30	15926