Era
20th century
643
1900-1999
298
1989-
255
1991-
138
1818-1883
120
Since 1989
105
1945-1989
61
1945-
60
1917-1936
59
Since 1991
59
1945-1991
49
21st century
47
Revolution, 1917-1921
40
1878-1953
38
1893-1976
37
1949-1976
37
1936-1953
34
1976-2000
32
1985-1991
31
1990-
29
1945-1980
27
Since 1900
25
1870-1924
24
1949-
22
1959-1990
22
1976-2002
22
1908-1957
21
1945-1953
21
1945-1992
20
1879-1940
19
1917-1945
19
1918-1945
19
1891-1937
18
Civil War, 1936-1939
18
1912-1949
16
Cultural Revolution, 1966-1976
16
1933-1945
15
Since 1990
15
1917-1921
14
1945-1985
13
2000-2099
13
1925-1953
12
1980-1989
12
Republic, 1912-1949
12
Revolution, 1956
12
1944-1989
11
2000-
11
Since 1945
11
1772-1837
10
1917-
10
more ...