20th century 1,472
1900-1999 1,252
19th century 688
1800-1899 512
1939-1945 198
18th century 163
Civil War, 1861-1865 156
1700-1799 109
1861-1865 108
21st century 97
1800-1999 86
17th century 84
16th century 82
1951- 60
1809-1865 55
2000-2099 54
1945-1989 49
1933-1945 48
1600-1699 47
1945- 46
Revolution, 1775-1783 43
Since 1900 43
1500-1599 38
1914-1918 34
1775-1783 33
1939 - 1945 33
1900 - 1999 32
1900-2099 31
1946- 31
1949- 31
1700-1899 29
1941- 28
1989- 28
1865-1950 27
1961-1975 26
1944- 25
1930- 24
1939- 24
1943- 24
1924- 23
1950- 23
Since 1951 22
To 1500 22
1934- 21
1960- 21
Colonial period, ca. 1600-1775 21
1706-1790 20
1933- 20
1937- 20
Since 1945 20
1783-1865 19
1936- 19
1948- 19
1775-1865 18
1837-1901 18
1882-1945 18
1959- 18
1931- 17
1956- 17
Early modern, 1500-1700 17
1835-1910 16
1942- 16
1962- 16
1980- 16
1818-1895 15
1922- 15
1923- 15
1925- 15
1928- 15
1929- 15
1932- 15
1935- 15
1938- 15
1954- 15
1815-1861 14
1926- 14
1945-1953 14
1952- 14
2003-2011 14
-1536 13
1500-1699 13
1953- 13
1961- 13
1965- 13
1743-1826 12
1846-1950 12
1947- 12
1963-1969 12
To 1865 12
1600-1775 11
1709-1784 11
1732-1799 11
1809-1882 11
1869-1948 11
1879-1955 11
1913-1994 11
1918-1945 11
1927- 11
30-600 11
1421-1737 10