答Chronology

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50058066070080090097010001100120015401600174018001900 520–579590–659750–799910–9691010–10991290–15391690–1739

1

1

1

1

1

1

2

2

1

2

1

1

1

1

1

2

1

1

3

2

2

1

1

1

7 +1

2

55 +49

20 +14

3

5

1

13 +7

11 +5

12 +6

3

1

3

1

1

5

1

1

No year recorded 169

+163

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 ↗