Quarter US dollars 2004-12-31 56 2005-03-31 51 2005-06-30 22 2005-09-30 27 2005-12-31 26 2006-03-31 31 2006-06-30 44 2006-09-30 11 2006-12-31 8 2007-03-31 10 2007-06-30 14 2007-09-30 26 2007-12-31 28 2008-03-31 64 2008-06-30 64 2008-09-30 64 2008-12-31 36 2009-03-31 17 2009-06-30 8 2009-09-30 8 2009-12-31 18 2010-03-31 30 2010-06-30 31 2010-09-30 80 2010-12-31 72 2011-03-31 95