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500580600700800900960100010801100120014101540166017001800 520–579910–9591010–10791230–14091420–15391600–1659

1

1

2

5

1

4

1

2

1

1

1

1

1

5

2

1

2

1

1

1

1

7 +1

1

2

1

4

4

1

2

1

1

1

1

3

5

1

1

1

1

4

1

1

2

10 +4

6

1

3

1

No year recorded 63

+57

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 ↗