CREATE TABLE table_66980 ("Name" TEXT, "Years" TEXT, "Gender" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT, "Roll" FLOAT)

Name the years for dannevirke south school
SELECT "Years" FROM table_66980 WHERE "Name" = 'dannevirke south school'
SELECT "Years" FROM "table_66980" WHERE "Name" = 'dannevirke south school'