Era
1865-
3
1865-1950
1
1899-1987
1
18th century
1
1900 - 1999
1
1900-1999
9
1908-1973
1
1915-2011
1
1917-
2
1917-2018
1
1918-
3
1933-1945
1
1945-
6
1945-1960
1
1945-1964
1
1946-
1
1948-
1
1951-
2
1960-
1
1960-1980
1
1961-1963
1
1961-1971
7
1961-1993
1
1963-1969
9
1963-1975
1
1964-1975
2
1969-1974
3
1971-
1
1971-1981
6
1980-1993
1
1981-1993
6
1981-2001
3
1993-
1
1997-
1
2000
1
2000-2099
1
2001-2009
4
2003-
1
2009-
9
2020
2
20th century
21
21st century
14
Colonial period, ca. 1600-1775
1
Since 1865
3
Since 1900
1
Since 1945
2
Since 1960
1
Since 2000
1
To 1809
1