Era
1789-1900
1
1900-1999
2
1945-
1
1945-1989
3
1945-1995
1
1950-
1
1976-1994
1
1977-1981
1
1980-
1
1984-
1
1988-
1
1989-
9
1989-1993
1
1990-
1
1993-
1
1993-2001
1
1993-2009
1
1994-
1
1995-
1
19th century
1
2001-2009
2
2001-2017
1
2009-2017
1
20th century
4
21st century
1
Since 1800
1
Since 1945
2
Since 1976
1
Since 1980
1
Since 1984
1
Since 1989
5
Since 1993
1