Era
20th century
25,864
19th century
12,695
18th century
4,760
1564-1616
3,227
17th century
2,941
21st century
2,933
1945-
2,570
Civil War, 1861-1865
2,507
16th century
2,017
Early modern, 1500-1700
1,700
1989-
1,433
1945-1989
1,419
Revolution, 1775-1783
1,363
1900-1999
1,243
1933-1945
1,217
Colonial period, ca. 1600-1775
1,191
To 1500
1,125
1918-1945
738
1882-1941
686
Middle English, 1100-1500
683
1608-1674
663
Early modern and Elizabethan, 1500-1600
640
1980-
610
1946-
554
-1400
536
1809-1865
508
1800-1899
468
1960-
452
1951-
447
Revolution, 1789-1799
447
1775-1865
443
2000-2099
434
1900 - 1999
427
To 1775
388
Middle Ages, 600-1500
381
1775-1783
361
1812-1870
352
1865-1950
349
1861-1865
346
Old English, ca. 450-1100
346
1783-1865
344
1960-1980
343
2001-2009
342
1770-1850
338
1843-1916
334
1818-1883
330
1993-
329
1897-1962
323
1981-1989
321
1888-1965
316
more ...