20th century 8,324
1900-1999 2,799
19th century 2,720
21st century 1,220
1900 - 1999 1,067
To 1846 1,017
1846-1850 909
1850-1950 637
1800-1899 569
1951- 521
2000-2099 501
20e siècle 432
Civil War, 1861-1865 264
18th century 239
Tertiary 229
1800 - 1899 207
1939-1945 204
Miocene 203
1947- 186
1950- 178
Pleistocene 176
1713-1784 175
Since 1951 170
Cenozoic 168
Quaternary 158
20e siècle 148
Pliocene 145
1944- 139
1934- 137
1800-1999 136
1900-2099 136
Cretaceous 136
1991 133
1970 124
1961-1970 123
1971-1980 123
21e siècle 119
1902-1968 116
1945- 113
1990 110
1994 109
1850 108
1803-1880 107
1927-1993 106
1861-1865 103
1989 103
From 2 to 65 million years ago 103
1992 101
Eocene 101
1929 98
1943- 98
1946- 98
1980 97
1938- 96
1988 96
1954- 91
1906 89
1947-2024 87
1824-1893 84
1813-1890 82
1985 82
1987 81
From 10 thousand to 2 million years ago 80
1984 79
From 10 to 25 million years ago 78
1846 - 1850 77
1929- 76
1941- 76
To 1848 76
1937- 75
1949- 75
1965 75
1951-1960 74
1952- 74
1882-1942 73
1961-1975 73
1971 73
1983 73
1930- 72
1939 - 1945 72
1969 72
2000 - 2099 72
From 65 million years ago 71
1972 69
1838-1914 68
1936- 67
-1853 66
1967 66
1993 66
California 66
1948- 65
19e siècle 65
1982 64
1933- 63
1968 63
1981 63
1867-1959 62
1979 62
1935- 61
1942- 61