Quarter	US dollars
1999-03-31	571
1999-06-30	675
1999-09-30	830
1999-12-31	769
2000-03-31	785
2000-06-30	756
2000-09-30	800
2000-12-31	772
2001-03-31	850
2001-06-30	933
2001-09-30	927
2001-12-31	883
2002-03-31	711
2002-06-30	767
2002-09-30	993
2002-12-31	1081
2003-03-31	1063
2003-06-30	981
2003-09-30	1075
2003-12-31	1205
2004-03-31	1279
2004-06-30	1372
2004-09-30	1349
2004-12-31	1530
2005-03-31	1712
2005-06-30	1624
2005-09-30	1619
2005-12-31	1198
2006-03-31	1213
2006-06-30	1798
2006-09-30	2047
2006-12-31	2618
2007-03-31	3346
2007-06-30	4167
2007-09-30	5032
2007-12-31	4233
2008-03-31	3797
2008-06-30	3814
2008-09-30	4200
2008-12-31	3148
2009-03-31	3619
2009-06-30	3602
2009-09-30	3453
2009-12-31	3518
2010-03-31	3294
2010-06-30	3322
2010-09-30	3366
2010-12-31	3428
2011-03-31	3715
2011-06-30	4008
2011-09-30	3760
2011-12-31	3627
2012-03-31	3955
2012-06-30	4063
2012-09-30	3859
2012-12-31	4310
2013-03-31	3943
2013-06-30	4087
2013-09-30	4451
2013-12-31	4481
2014-03-31	3985
2014-06-30	4664
2014-09-30	3969
2014-12-31	3677
2015-03-31	2381
2015-06-30	2571
2015-09-30	2397
2015-12-31	2441
2016-03-31	2281
2016-06-30	1866
2016-09-30	1788
2016-12-31	1708
2017-03-31	1901
2017-06-30	1620
2017-09-30	1877
2017-12-31	1758
2018-03-31	2050
2018-06-30	980
2018-09-30	1061
2018-12-31	913
2019-03-31	711
2019-06-30	676
2019-09-30	873
2019-12-31	765
2020-03-31	734
2020-06-30	876
2020-09-30	721
2020-12-31	764
2021-03-31	763
2021-06-30	831
2021-09-30	1054
2021-12-31	934
2022-03-31	1123
2022-06-30	889
2022-09-30	845
2022-12-31	969
2023-03-31	1517
2023-06-30	1586
2023-09-30	1298