Era
20th century
111
1924-
109
1977-1981
65
1945-1989
49
1900-1999
37
1989-
31
21st century
25
1951-
20
1974-1977
20
Since 1900
16
1976
12
1969-1974
10
1981-1989
10
Since 1945
9
1933-1945
8
1900-2099
7
1913-2006
7
1960-1980
7
1945-
6
Since 1951
6
1928-2017
5
1971-1981
5
1913-1994
4
1946-
4
1973-1993
4
2001-2009
4
Since 2000
4
1969-
3
1970-
3
1980
3
1993-
3
2017-
3
Since 1933
3
1898-1983
2
1917-1998
2
1917-2002
2
1918-1981
2
1953-1985
2
1953-1991
2
1963-1969
2
1967-1993
2
1971-1980
2
1985-1991
2
1989-1993
2
1994-
2
2000-2099
2
2001-
2
Civil War, 1994
2
Since 1994
2
1865-1950
1
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