甘Chronology

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50058060070080090097010001100122015401600172018001900 520–579840–899910–9691010–10991160–12191230–15391670–1719

1

1

2

5

1

1

1

3

1

1

2

2

1

1

1

1

2

1

1

6

1

1

1

3

1

8 +2

1

1

4

3

15 +9

11 +5

5

98 +92

11 +5

5

24 +18

7 +1

8 +2

2

2

No year recorded 351

+345

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 ↗