Quarter	US dollars
1999-03-31	1660
1999-06-30	3090
1999-09-30	2896
1999-12-31	2373
2000-03-31	2335
2000-06-30	2290
2000-09-30	1718
2000-12-31	2228
2001-03-31	1414
2001-06-30	1459
2001-09-30	1197
2001-12-31	968
2002-03-31	758
2002-06-30	902
2002-09-30	743
2002-12-31	530
2003-03-31	596
2003-06-30	1372
2003-09-30	535
2003-12-31	646
2004-03-31	599
2004-06-30	684
2004-09-30	563
2004-12-31	683
2005-03-31	1047
2005-06-30	818
2005-09-30	982
2005-12-31	926
2006-03-31	835
2006-06-30	1177
2006-09-30	892
2006-12-31	1184
2007-03-31	1412
2007-06-30	2407
2007-09-30	813
2007-12-31	726
2008-03-31	523
2008-06-30	1073
2008-09-30	923
2008-12-31	990
2009-03-31	752
2009-06-30	787
2009-09-30	766
2009-12-31	1437
2010-03-31	1324
2010-06-30	836
2010-09-30	1459
2010-12-31	1852
2011-03-31	1191