Quarter	US dollars
1999-03-31	631
1999-06-30	552
1999-09-30	644
1999-12-31	644
2000-03-31	761
2000-06-30	718
2000-09-30	771
2000-12-31	875
2001-03-31	950
2001-06-30	907
2001-09-30	912
2001-12-31	991
2002-03-31	979
2002-06-30	1004
2002-09-30	1112
2002-12-31	1039
2003-03-31	1094
2003-06-30	892
2003-09-30	1012
2003-12-31	1095
2004-03-31	1018
2004-06-30	944
2004-09-30	903
2004-12-31	1003
2005-03-31	1180
2005-06-30	1035
2005-09-30	1136
2005-12-31	1171
2006-03-31	1338
2006-06-30	1550
2006-09-30	1684
2006-12-31	1699
2007-03-31	1888
2007-06-30	1988
2007-09-30	1863
2007-12-31	2296
2008-03-31	2395
2008-06-30	2537
2008-09-30	2537
2008-12-31	2582
2009-03-31	2756
2009-06-30	3196
2009-09-30	3059
2009-12-31	2787
2010-03-31	2781
2010-06-30	2918
2010-09-30	3303
2010-12-31	2982
2011-03-31	3345
2011-06-30	3194
2011-09-30	3053
2011-12-31	3615
2012-03-31	4003
2012-06-30	3781
2012-09-30	3055
2012-12-31	3129
2013-03-31	2905
2013-06-30	3252
2013-09-30	3315
2013-12-31	2788
2014-03-31	2597
2014-06-30	2508
2014-09-30	2436
2014-12-31	2564
2015-03-31	2630
2015-06-30	2439
2015-09-30	2660
2015-12-31	2916
2016-03-31	2868
2016-06-30	2623
2016-09-30	2492
2016-12-31	2272
2017-03-31	2855
2017-06-30	2709
2017-09-30	2138
2017-12-31	1575
2018-03-31	2005
2018-06-30	2375
2018-09-30	2324
2018-12-31	1999
2019-03-31	1755
2019-06-30	2679
2019-09-30	1945
2019-12-31	1665
2020-03-31	1454
2020-06-30	1603
2020-09-30	1364
2020-12-31	1417
2021-03-31	1314
2021-06-30	2254
2021-09-30	1409
2021-12-31	1467
2022-03-31	909
2022-06-30	1184
2022-09-30	818
2022-12-31	1167
2023-03-31	1013
2023-06-30	1982
2023-09-30	1203