Era
1948-
1971-
48
Since 1971
6
1974-1977
3
1985-1990
2
Since 1948
2
1756-1815
1
1893-1985
1
1915-1998
1
1924-2018
1
1945-
1
1945-1982
1
1948-1980
1
1961 - 1975
1
1961-1975
1
1972-1974
1
1984-
1
1989-
1
1991
1
20th century
1
638-713
1
Since 1945
1
Since 1989
1
active 4th century B.C
1
active 4th century B.C.
1