Quarter	US dollars
1999-03-31	846658
1999-06-30	832217
1999-09-30	905732
1999-12-31	887172
2000-03-31	952987
2000-06-30	971061
2000-09-30	967134
2000-12-31	1058482
2001-03-31	1112736
2001-06-30	1048737
2001-09-30	1112050
2001-12-31	1113044
2002-03-31	1089944
2002-06-30	1192004
2002-09-30	1212546
2002-12-31	1332324
2003-03-31	1402811
2003-06-30	1543164
2003-09-30	1464645
2003-12-31	1541906
2004-03-31	1681726
2004-06-30	1701019
2004-09-30	1706577
2004-12-31	1849079
2005-03-31	1942352
2005-06-30	1944980
2005-09-30	1999757
2005-12-31	1958709
2006-03-31	2160719
2006-06-30	2221599
2006-09-30	2196762
2006-12-31	2308913
2007-03-31	2669987
2007-06-30	2686615
2007-09-30	2885742
2007-12-31	3094555
2008-03-31	3431038
2008-06-30	2915537
2008-09-30	2798557
2008-12-31	2618522
2009-03-31	2426676
2009-06-30	2446116
2009-09-30	2434422
2009-12-31	2438980
2010-03-31	2388853
2010-06-30	2258853
2010-09-30	2366383
2010-12-31	2308640
2011-03-31	2331990
2011-06-30	2312454
2011-09-30	2424454
2011-12-31	2347265
2012-03-31	2389665
2012-06-30	2255848
2012-09-30	2321083
2012-12-31	2310444
2013-03-31	2138820
2013-06-30	1993242
2013-09-30	1918038
2013-12-31	1936656
2014-03-31	1928819
2014-06-30	1944847
2014-09-30	1827629
2014-12-31	1747155
2015-03-31	1643866
2015-06-30	1595686
2015-09-30	1525885
2015-12-31	1547816
2016-03-31	1560561
2016-06-30	1539191
2016-09-30	1423360
2016-12-31	1366596
2017-03-31	1400576
2017-06-30	1501614
2017-09-30	1466214
2017-12-31	1482236
2018-03-31	1531674
2018-06-30	1453935
2018-09-30	1408537
2018-12-31	1389765
2019-03-31	1521447
2019-06-30	1544313
2019-09-30	1558771
2019-12-31	1475510
2020-03-31	1640302
2020-06-30	1635756
2020-09-30	1682784
2020-12-31	1865735
2021-03-31	1904632
2021-06-30	1829585
2021-09-30	1802635
2021-12-31	1817001
2022-03-31	1888034
2022-06-30	1835874
2022-09-30	1720628
2022-12-31	1756160
2023-03-31	1811323
2023-06-30	1802674
2023-09-30	1814418