Quarter	US dollars
2004-12-31	4134
2005-03-31	4146
2005-06-30	4083
2005-09-30	4289
2005-12-31	4413
2006-03-31	5989
2006-06-30	6382
2006-09-30	6765
2006-12-31	8078
2007-03-31	8506
2007-06-30	8415
2007-09-30	8258
2007-12-31	8493
2008-03-31	8852
2008-06-30	8766
2008-09-30	8199
2008-12-31	6484
2009-03-31	6314
2009-06-30	6541
2009-09-30	6541
2009-12-31	4257
2010-03-31	4075
2010-06-30	5638
2010-09-30	6116
2010-12-31	5579
2011-03-31	5550
2011-06-30	5918
2011-09-30	5686
2011-12-31	5294
2012-03-31	5571
2012-06-30	5925
2012-09-30	5760
2012-12-31	5814
2013-03-31	4456
2013-06-30	4066
2013-09-30	5323
2013-12-31	4917
2014-03-31	5085
2014-06-30	6157
2014-09-30	5144
2014-12-31	5218
2015-03-31	4711
2015-06-30	4717
2015-09-30	5036
2015-12-31	5227
2016-03-31	3465
2016-06-30	3752
2016-09-30	3713
2016-12-31	3287
2017-03-31	3368
2017-06-30	3540
2017-09-30	3848
2017-12-31	4077
2018-03-31	4159
2018-06-30	4217
2018-09-30	4078
2018-12-31	4198
2019-03-31	4399
2019-06-30	4465
2019-09-30	4890
2019-12-31	5099
2020-03-31	5062
2020-06-30	4558
2020-09-30	4753
2020-12-31	5075
2021-03-31	5331
2021-06-30	6147
2021-09-30	6209
2021-12-31	5976
2022-03-31	5633
2022-06-30	5359
2022-09-30	5041
2022-12-31	5068
2023-03-31	5004
2023-06-30	5116
2023-09-30	4731