var pref_data = [
["Αθήνα~Athens - Center~1037","Ανατολικά Προάστια~Athens - East~1038","Βόρεια Προάστια~Athens - North~1039","Δυτικά Προάστια~Athens - West~1045","Ν. Αργολίδος  ~Argolis ~11","Ν. Κερκύρας~Corfu ~32","Ν. Κορινθίας ~Corinthia ~36","Νότια Προάστια~Athens - South~1040","Πειραιάς~Piraeus~1041","Υπόλοιπη Αττική~Rest of Attika~1042"]
];