許Chronology

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500580600670700850900100010801100120015401600170018001900 510–579620–669750–849910–9991010–10791290–1539

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

6

1

1

1

1

3

1

2

4

3

6

40 +34

16 +10

15 +9

12 +6

4

2

11 +5

7 +1

15 +9

4

16 +10

23 +17

4

3

1

2

9 +3

2

No year recorded 316

+310

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 ↗