變Chronology

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5005806007008009001000108011001200141015401660177018001900 520–579910–9991010–10791230–14091420–15391600–16591700–1769

1

2

1

5

1

2

1

1

2

1

1

1

4

2

2

2

2

1

2

1

2

1

3

1

2

2

1

1

4

1

2

1

1

5

9 +3

3

1

8 +2

2

6

3

2

No year recorded 78

+72

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 ↗