Era
1960-
6
1991-
5
20th century
5
1994-
4
1948-
3
1993-
3
21st century
3
1945-
2
1979-
2
1980-
2
1988-
2
1989-
2
2001-
2
2002-
2
1937-1979
1
1946-
1
1947-
1
1959-
1
1959-1990
1
1961-1978
1
1966-
1
1968-1998
1
1969-
1
1973-
1
1973-1988
1
1975-
1
1975-1977
1
1976-2002
1
1977-
1
1978-
1
1991-2003
1
1993
1
1995-2005
1
1997-
1
1998-
1
Civil War, 1975-
1
Revolution, 1959
1
South African Incursions, 1978-1990
1