Era
1918-
1970-
1970-1973
40
Since 1918
37
Since 1970
15
1918-1970
8
1946-
5
20th century
4
1908-1973
3
1945-
3
1946-1974
3
1970 - 1973
3
1970-1982
3
1973-1988
3
1900-1999
2
1918-1999
2
1959-
2
1970-1991
2
21st century
2
Since 1900
2
1917-
1
1918 - 1970
1
1918 - 1994
1
1918-2014
1
1919-
1
1929-2004
1
1931-2022
1
1934-
1
1935-1999
1
1936-2004
1
1945-1991
1
1946-1970
1
1953-1985
1
1953-1991
1
1958-
1
1963-
1
1964-
1
1965-
1
1967-
1
1970 - 1991
1
1970-1994
1
1970-2000
1
1971-2000
1
1972-
1
1974-
1
1977-
1
1978-
1
1982-1994
1
2000 - 2099
1
2000-
1
more ...