Era
1948-
20th century
8
1961-1997
2
1910-1982
1
1911-
1
1912-1949
1
1921-2021
1
1926-
1
1926-2022
1
1930-2002
1
1933-
1
1935-
1
1936-
1
1938-2010
1
1943-
1
1944-
1
1945-
1
1947-
1
1948
1
1949-1992
1
1952-
1
1969-
1
1975-
1
1979-1997
1
1981-
1
1981-1990
1
1991-2000
1
21st century
1
356 B.C.-323 B.C.
1
Elizabeth II, 1952-
1
Elizabeth II, 1952-2022
1
Macedonian Expansion, 359 B.C.-323 B.C.
1
Since 1900
1
Since 1948
1
Since 1952
1