Extended Timeline
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56 . . . 1712 1713 1714 . . . 1775 1776 1777 . . . 1846 1847 1848 . . . 1898 1899 1900 . . . 1927 1928 1929 . . . 1933 1934 1935 . . . 1954 1955 1956 . . . 1968 1969 1970 . . . 1976 1977 1978 . . . 1986 1987 1988 . . . 1997 1998 1999 ... 2