1963–64 Regionalliga1964–65 Regionalliga1965–66 Regionalliga1966–67 Regionalliga1967–68 Regionalliga1968–69 Regionalliga1969–70 Regionalliga1970–71 Regionalliga1971–72 Regionalliga1972–73 Regionalliga1973–74 Regionalliga2010–11 Regionalliga2011–12 Regionalliga2015–16 RegionalligaGerman football league system