Era
1918-1945
1
1945-
9
1946-
2
1971-
1
1971-1981
4
1971-2001
2
1980-
1
1981-
4
1981-2001
11
1981-2009
3
1982-
1
1988-
2
1989-
1
1990-
1
1991-
2
1993-2001
4
1994-
2
2000-
1
2000-2099
1
2001-
1
2001-2009
7
2009-
4
2009-2017
2
2016
1
20th century
1
21 st century
1
21st century
7
Siglo 20
1
Since 1945
7
Since 1981
5