Quarter	US dollars
1999-09-30	1699
1999-12-31	1631
2000-03-31	1771
2000-06-30	1917
2000-09-30	1938
2000-12-31	2669
2001-03-31	2588
2001-06-30	2734
2001-09-30	2661
2001-12-31	2424
2002-03-31	2407
2002-06-30	2321
2002-09-30	2228
2002-12-31	2115
2003-03-31	1960
2003-06-30	1967
2003-09-30	2082
2003-12-31	1878
2004-03-31	1981
2004-06-30	2001
2004-09-30	2052
2004-12-31	2223
2005-03-31	2354
2005-06-30	2366
2005-09-30	2667
2005-12-31	2618
2006-03-31	2789
2006-06-30	3166
2006-09-30	3258
2006-12-31	7666
2007-03-31	6200
2007-06-30	7075
2007-09-30	6701
2007-12-31	6735
2008-03-31	6785
2008-06-30	7103
2008-09-30	7201
2008-12-31	6987
2009-03-31	6587
2009-06-30	6684
2009-09-30	6752
2009-12-31	6580
2010-03-31	6854
2010-06-30	6709
2010-09-30	7310
2010-12-31	7203
2011-03-31	7249
2011-06-30	7723
2011-09-30	8138
2011-12-31	8136
2012-03-31	8088
2012-06-30	8033
2012-09-30	8023
2012-12-31	8281
2013-03-31	8225
2013-06-30	8163
2013-09-30	8197
2013-12-31	2454
2014-03-31	2553
2014-06-30	2671
2014-09-30	2716
2014-12-31	2870
2015-03-31	2570
2015-06-30	2312
2015-09-30	2165
2015-12-31	1992
2016-03-31	1961
2016-06-30	1708
2016-09-30	1633
2016-12-31	1297
2017-03-31	1206
2017-06-30	1033
2017-09-30	1344
2017-12-31	1460
2018-03-31	1601
2018-06-30	1463
2018-09-30	1793
2018-12-31	1774
2019-03-31	1349
2019-06-30	1429
2019-09-30	1348
2019-12-31	1346
2020-03-31	1405
2020-06-30	1295
2020-09-30	1273
2020-12-31	1137
2021-03-31	1253
2021-06-30	1316
2021-09-30	1157
2021-12-31	1542
2022-03-31	1079
2022-06-30	1183
2022-09-30	1414
2022-12-31	1618
2023-03-31	1370
2023-06-30	1107
2023-09-30	1029