占Chronology

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50071083010001110123015901600170018001900 510–709720–829840–9991010–11091130–12291290–1589

1

1

2

1

1

1

1

1

2

1

1

1

1

5

4

2

2

2

2

3

2

2

1

No year recorded 29

+23

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗