#for dat in ['2001','2002','2003','2004', '2005','2006','2007','2008','2009','2010','2011'] :
# path = os.path.join(txtdir,dat)
#for dat in ['2001','2002','2003','2004', '2005','2006','2007','2008','2009','2010','2011'] :
# path = os.path.join(txtdir,dat)