20th century 2,287
19th century 1,363
To 1846 1,133
Revolution, 1835-1836 938
1900-1999 918
Civil War, 1861-1865 829
Republic, 1836-1846 590
1846-1950 577
1800-1899 403
1951- 356
1861-1865 343
1865-1950 331
1900 - 1999 316
21st century 293
Cretaceous 249
1836-1846 236
1835-1836 210
Permian 203
1821-1861 193
1793-1863 165
1800 - 1899 160
Since 1951 154
20e siècle 136
2000-2099 131
1861 - 1865 114
1841-1845 113
1951-1960 108
1846-1865 103
From 65 to 140 million years ago 99
20e siècle 93
1836 92
1800-1999 91
1991-2000 88
1961-1970 84
From 230 to 280 million years ago 81
Revolution, 1910-1920 78
Pennsylvanian 77
1800-1950 72
1810-1821 72
1793-1836 69
1846 - 1950 69
18th century 67
1835 - 1836 65
1993 64
1786-1836 63
1981-1990 63
1908-1973 61
Tertiary 61
Paleozoic 60
1931-1940 59
1946- 58
1917-1963 56
1941-1950 56
1959-1993 55
1775-1865 54
19e siècle 53
19e siècle 51
1971-1980 50
Eocene 50
1836 - 1846 49
1939-1945 48
1900-2099 46
1929 46
1794-1876 43
1800 - 1950 43
1815-1875 42
1845-1849 42
1815-1861 40
21e siècle 36
Jusqu'à 1846 36
1643-1687 35
Wars of Independence, 1810-1821 35
1837-1841 34
Carboniferous 34
Pleistocene 34
Quaternary 34
Triassic 34
1794?-1876 31
1865 - 1950 31
To 1848 31
To 1899 31
1798-1859 30
1800 - 1999 30
1853-1895 30
1867-1910 29
1933- 29
1866-1895 28
1920-1980 28
1941- 28
Cenozoic 28
From 230 to 570 million years ago 28
1865-1877 27
1920- 27
1948- 27
To 1931 27
1844 26
1845 26
1974 26
To 1950 26
1777-1852 25