俗Chronology

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610700800900100010801100122015401600170018001900 620–699750–799910–9991010–10791160–12191230–1539

1

1

1

1

1

2

1

1

1

1

1

1

1

2

2

3

1

1

5

1

1

1

28 +22

5

1

23 +17

1

1

3

28 +22

21 +15

14 +8

16 +10

4

10 +4

27 +21

21 +15

2

9 +3

7 +1

2

2

1

3

2

No year recorded 197

+191

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 ↗