1804 3 21 | | |  | 1887 3 21 Hertz | | |  | 1927 3 21 | | |  | 1955 3 21 | | |  | 1960 3 21 | | | 1977 | | |  | 1976 3 21 | | |  | 1990 3 21 | | Nujoma | |  | |