乞Chronology

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50058060068070081090096011001200141015401600170018001900 520–579620–679750–809840–899910–959980–10991290–14091420–1539

1

1

1

1

1

1

1

1

1

1

1

2

1

1

3

1

1

1

1

1

1

1

1

2

29 +23

26 +20

33 +27

5

1

2

3

1

2

6

3

2

2

2

2

1

3

12 +6

No year recorded 62

+56

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 ↗