Quarter	US dollars
2004-12-31	23296
2005-03-31	24522
2005-06-30	25097
2005-09-30	28596
2005-12-31	28266
2006-03-31	30508
2006-06-30	31678
2006-09-30	33605
2006-12-31	34064
2007-03-31	33640
2007-06-30	36998
2007-09-30	43236
2007-12-31	39649
2008-03-31	36254
2008-06-30	39213
2008-09-30	35583
2008-12-31	30723
2009-03-31	33168
2009-06-30	31477
2009-09-30	27773
2009-12-31	27088
2010-03-31	29259
2010-06-30	29083
2010-09-30	24516
2010-12-31	22014
2011-03-31	22670
2011-06-30	20985
2011-09-30	18536
2011-12-31	16280
2012-03-31	13469
2012-06-30	13598
2012-09-30	11427
2012-12-31	10097
2013-03-31	9110
2013-06-30	8763
2013-09-30	8740
2013-12-31	8623
2014-03-31	8680
2014-06-30	7887
2014-09-30	7253
2014-12-31	7845
2015-03-31	9352
2015-06-30	9793
2015-09-30	9281
2015-12-31	6704
2016-03-31	6177
2016-06-30	4825
2016-09-30	4864
2016-12-31	2950
2017-03-31	2918
2017-06-30	2268
2017-09-30	2129
2017-12-31	2603
2018-03-31	2262
2018-06-30	2213
2018-09-30	2779
2018-12-31	3043
2019-03-31	2441
2019-06-30	2952
2019-09-30	2450
2019-12-31	3094
2020-03-31	2469
2020-06-30	2855
2020-09-30	1676
2020-12-31	2510
2021-03-31	3223
2021-06-30	3554
2021-09-30	3502
2021-12-31	4218
2022-03-31	4400
2022-06-30	4563
2022-09-30	3903
2022-12-31	4186
2023-03-31	4179
2023-06-30	4063
2023-09-30	3636