Era
1969-
20th century
21
1961-1969
15
1945-1989
9
1989-
8
Since 1900
8
1981-1989
7
Since 1969
7
1960-1980
5
1969-1974
5
1974-1977
4
1989-1993
4
Since 1945
4
1945-
3
1946-
3
1963-1969
3
1971-1981
3
1975-
3
1977-1981
3
1980-
3
21st century
3
Since 1961
3
active 19th century
3
1945-1975
2
1960-
2
1966-
2
1970-
2
1980-2020
2
1993-2001
2
2000-2099
2
Civil War, 2011-
2
Since 1960
2
1908-1961
1
1913-1994
1
1913-2006
1
1914-1974
1
1924-
1
1924-2018
1
1926-1984
1
1930-
1
1933-2006
1
1934-
1
1934-2024
1
1935-
1
1936-
1
1937-
1
1943-
1
1947-
1
1948-
1
1956-
1
more ...