Quarter	US dollars
1999-09-30	1006
1999-12-31	1003
2000-03-31	1019
2000-06-30	1493
2000-09-30	1381
2000-12-31	1257
2001-03-31	1153
2001-06-30	1159
2001-09-30	1274
2001-12-31	1410
2002-03-31	1531
2002-06-30	1573
2002-09-30	1766
2002-12-31	1911
2003-03-31	1813
2003-06-30	1969
2003-09-30	1891
2003-12-31	1828
2004-03-31	1731
2004-06-30	1821
2004-09-30	1406
2004-12-31	1200
2005-03-31	1537
2005-06-30	903
2005-09-30	899
2005-12-31	972
2006-03-31	1008
2006-06-30	1370
2006-09-30	824
2006-12-31	941
2007-03-31	1122
2007-06-30	989
2007-09-30	841
2007-12-31	866
2008-03-31	767
2008-06-30	832
2008-09-30	704
2008-12-31	1970
2009-03-31	3677
2009-06-30	3756
2009-09-30	1303
2009-12-31	1426
2010-03-31	1455
2010-06-30	3019
2010-09-30	2663
2010-12-31	2193
2011-03-31	1699