Era
1974-
1975-
60
1975-1982
42
Since 1974
30
21st century
20
20th century
18
1975-2008
15
1939-1975
12
1933-1974
11
1982-
9
1980-
8
Since 1900
8
1973-
7
2000-2099
7
1967-1974
5
1918-1974
4
Revolution, 1974
4
1945-
3
1975-1982-
3
1900-1999
2
1900-2099
2
1908-1975
2
1918-1975
2
1936-1989
2
1951-
2
1969-
2
1970-
2
1972-1984
2
1973-1988
2
Since 1918
2
Since 1933
2
Since 1973
2
1818-
1
1889-1970
1
1892-1975
1
1900 - 1999
1
1910-1974
1
1918-
1
1934-
1
1936-1939
1
1938-
1
1942-
1
1944-
1
1948 - 1980
1
1948-
1
1948-1980
1
1952-
1
1953-
1
1956-
1
1958-
1
more ...