Cyfnod
1945-
8
20th century
8
Since 1945
7
1970-
4
1989-
4
21st century
4
Since 1989
4
1802-1876
3
1723-1790
2
1818-1883
2
1883-1946
2
1981-
2
1982-
2
19th century
2
2000-
2
Since 1970
2
Since 1981
2
1535-1624
1
1772-1823
1
1781-1832
1
1820-1895
1
1837-1898
1
1890-1914
1
18th century
1
1901-1986
1
1918-
1
1944-
1
1959-1990
1
1969-1975
1
1971-1981
1
1973-
1
1975-
1
1982-1994
1
1990-
1
1991-
1
1993-
1
1993-2001
1
2001-2009
1
2008-
1
2009-
1
Civil War, 1936-1939
1
Guerra Civil, 1936-1939
1
S XX
1
Since 1982
1
Since 1991
1
Since 1993
1
Since 2000
1
s. 20
1
s.17
1
s.21
1