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50058060070080090096010801100120014101540160017001800 520–579910–959980–10791290–14091420–1539

1

2

1

13 +7

1

29 +23

1

1

1

1

1

1

1

4

3

1

3

1

1

1

5

1

2

3

1

1

1

2

1

1

1

1

22 +16

1

6

6

2

34 +28

18 +12

2

25 +19

5

6

31 +25

11 +5

12 +6

2

4

1

No year recorded 161

+155

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 ↗