SELECT "Density" FROM table_23567 WHERE "Traditional" = '古田縣'
Name the density for
CREATE TABLE table_23567 (
    "English Name" text,
    "Simplified" text,
    "Traditional" text,
    "Pinyin" text,
    "Foochow" text,
    "Area" real,
    "Population" real,
    "Density" real
)