Era
1981-
3
1981-1993
3
1945-
2
1960-1980
2
United States
2
1775 - 1783
1
1783 - 1789
1
17th century
1
1861-1865
1
18th century
1
1945 - 1970
1
1945-1989
1
1949-
1
1960-
1
1961-1971
1
1969-
1
1971-1981
1
1971-1990
1
1980-
1
1981
1
1989-
1
1993-
1
20th century
1
20th century --
1
Colonial period, ca. 1600 - 1775
1
France
1
Iran
1