量Chronology

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4605005806007008009009601000108011001200141015901650170018001900 520–579910–9591010–10791150–11991230–14091420–15891600–1649

1

1

2

1

30 +24

1

27 +21

1

1

2

2

1

1

1

4

1

2

1

1

1

1

2

1

4

1

2

2

2

2

1

1

1

1

1

3

7 +1

2

2

25 +19

6

1

6

12 +6

26 +20

2

6

12 +6

24 +18

9 +3

10 +4

No year recorded 93

+87

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 ↗