Era
1809-1865
1
1863-1931
1
1864-1929
1
1897-1932
1
1900-1999
8
1902-1979
1
1912-2005
1
1914-2005
1
1915-1923
1
1916-1962
1
1939-1945
1
1945-
2
1945-1953
3
1945-1989
3
1946-
2
1948-
1
1970-
1
1971-
1
1975-
3
1980-
8
1980-2020
1
1983-
2
1995-
1
1995-2012
2
2000-2099
3
2001
1
2009-2017
2
20th century
16
21st century
5
Colonial period, ca. 1600-1775
3
Since 1900
2
Since 1971
1
Since 1975
2
Since 1980
3
Since 2020
1
To 1865
3