疾Chronology

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50058060067070080090010001100120014101540160017201800 520–579620–669910–9991010–10991290–14091420–15391670–1719

1

1

2

4

1

1

1

1

1

2

1

1

2

2

1

1

1

3

1

2

1

2

1

1

1

1

1

1

1

1

2

2

4

6

4

5

4

10 +4

2

2

9 +3

1

7 +1

No year recorded 56

+50

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 ↗