Era
1945-
81
1971-1981
38
Since 1945
35
1955-1965
21
1961-1971
20
1971-
20
1976-
20
1949-1976
18
1981-1993
18
1976-2000
17
1981-2001
15
Since 1971
14
1975-1985
12
1918-
9
1945-1989
9
1955-
8
1945-1955
7
1949-
7
1965-1975
7
1976-1980
7
1991-
7
1961-
6
1981 - 2001
5
1981-1985
5
Since 1981
5
Since 1991
5
1931-
4
1931-2022
4
1961-1981
4
Since 1955
4
1917-1945
3
1945-1971
3
1949 - 1976
3
1961 - 1971
3
1966-1970
3
1971-1975
3
1981-
3
1989-
3
Since 1918
3
Since 1976
3
Since 1989
3
1959-1990
2
1965-
2
1965-1980
2
1974 - 1990
2
1974-1990
2
1975 - 1985
2
1976 - 2000
2
1976-2002
2
1981 - 1993
2
more ...