Era
1925-
85
20th century
46
1939-
29
20th century --
26
1903-1990
18
21st century
18
1922-1976
17
1947-
15
21st century --
14
1953-
11
1953
10
1922-
7
1929-1973
7
1969-
7
1934-
6
19th century
6
1895-1962
5
1915-1973
5
1925
5
1926-
5
1936-
5
1938-
5
1942-1945
5
1943-
5
1948-1960
5
19th century --
5
1929-
4
1933-
4
1940-
4
1949-
4
1969
4
1969 --
4
21th century --
4
Japanese occupation, 1942-1945
4
15th century
3
1921-
3
1922-1990
3
1924
3
1924-
3
1928-
3
1935-
3
1938
3
1941-
3
1945-1957
3
1951-
3
1962
3
1964-
3
1969- --
3
1996-2000
3
1997-1998
3
more ...