Era
20th century
252
2001-2021
168
1900-1999
105
19th century
85
1945-
48
1945-1989
47
21st century
40
1989-
28
1800-1899
26
2000-
24
2000-2099
19
18th century
17
1933-1945
17
1952-1998
17
1783-1865
14
Revolution, 1775-1783
14
Since 1945
14
2001-
12
1945-1985
10
1948-
10
1959-1990
10
2001-2009
10
1918-1945
9
1960-
9
1991-
9
Colonial period, ca. 1600-1775
9
Since 1900
9
1898-1952
8
1988-
8
1800-1999
7
1945-1953
7
1953-1961
7
1957-
7
1980-
7
1918-
6
1951-
6
1970-
6
2002-
6
1898-1946
5
1946-
5
1949-
5
1965-
5
1975-
5
1979-
5
1981-
5
1982-
5
1990-
5
1993-
5
1998-
5
American occupation, 1915-1934
5
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